Some people have asked why. It's a legitimate question. Wasn't sure how this thread would turn out so gave very little info at first. Don't want to get into all of the reasons but there are many. For example, could stand to lose 15+ pounds of fat. Beer, liquor with mixers and wine all cause weight gain. Especially when drunkenness sets in and overeating starts. At a party, maybe cookies or cheese. At home, woke up to find a 1/2 gallon of ice cream gone once. Didn't remember having it. Should quit for medical reasons also. Have GERD and alcohol makes the problem worse.
Really just tied of the downward spiral. The physical pain. The hurting of others. The excessive misspelling of words on this forum. Don't want to end up with a DUI or worse like some people. Could be a better, more productive person. Seems like for that process to start, alcohol needs to go.
WRT fat, I will repeat the exercise/sports suggestion. If you find it's too difficult to make yourself exercise in the evening when you might otherwise be drinking, sign up for an organized league of something (basketball, kickball, soccer, whatever) so that you can't say, "well, I'll just put this off until tomorrow" and end up never doing it at all. If you want to shed some pounds, exercise will naturally be a part of that anyway, so schedule the exercise so that it interferes with your normal drinking schedule (which is the evening for most folks), and kill two birds with one stone.
Don't drink when you are thirsty. If I spend all day in the yard doing yard work, a cold beer sounds like the best idea in the world when I'm done. But if I'm thirsty, that first beer will be gone in 5 minutes and a second one started before I know it. Take time to have a few glasses of water first and that post-yardwork beer is one beer instead of three.
Don't drink when you are hungry. Similar to the post-yardwork beer, the after work beer would often disappear before I knew it and I'd be on my second beer at dinner time. If I wait and have that first beer with dinner, it's one beer, I enjoy it more, and I'm often still working on it an hour later while cleaning the kitchen. If you're thirsty at dinner time though, drink a glass or two of water first, otherwise that dinner beer can be gone in 5 minutes too.
Substitutes help. I used to drink a ton of soda and just switching to water didn't quite do it for me. Iced tea, however, was flavorful enough that it was an acceptable substitute and I was able to cut the soda consumption way back. I've never found a good substitute for beer personally. Some folks I know who have quit entirely will drink the NA beers out there. I tried them and to me they are not very good. Like NCGOPer_for_Paul said about the macrobrews, I would rather not drink them at all, but they seem to work for some folks.
As for the late night or all night events, you need to go to bed. Join an evening basketball league. It'll wipe you out and you won't be up until 3am. In the absence of physical exhaustion,
Melatonin works pretty good. At any rate, step away from the screen and read a book. The light from computer and TV screens will keep you up at night and prevent you from getting the sleep you need for a healthy lifestyle, regardless of alcohol consumption.
Who said 12 or 16 ounces were the only serving sizes? It won't always be on the menu at a restaurant, but most places that I've been will sell you a half-pint and only charge you half-price. This is great for when you are out and have had a beer with a long dinner and might want a little bit more but don't want to commit to a full drink. If you're drinking from a bottle or the restaurant doesn't want to give you a half-pour, maybe someone in your dinner party would be willing to split a beer with you. I have even done this at home on some occasions. On a yard work day I might want to have a beer with my lunch of grilled bratwurst but if I have to continue with the yard work after lunch, I will sometimes pop the cap on the bottle, pour half into a glass, put the cap back on the bottle and put the bottle back in the fridge. If the bottle makes it to the lunch table, all 12 ounces will get consumed, believe me

but if only six ounces are in front of me, that's all I will drink (and you can't have bratwurst w/out beer, right??). The re-capped bottle will hold the carbonation until later in the evening.
If you drink wine, you need to get those rubber stoppers with the vacuum pump. Just shoving the cork back in doesn't keep the wine and the frugal among us can sometimes be tempted to have a little extra if we think what's remaining in the bottle will go bad and it will be "wasted." With the vacuum seal, I don't have any qualms opening a bottle and pouring one glass and sealing it up for some other day.
Anyway, these are my tips to help you reduce your intake. If you want to target 2-3 drinks a day and you're currently at 8, you need to wean yourself off. Shoot for 2 drinks maybe, but allow yourself 6 per day that first week so that you're not a failure if you have 4-5 instead of the 2. Most heavy drinkers I have known got there over a long period of time and it'll take a bit of time to reduce the intake too. My personal experience is that an active lifestyle is incompatible with regular heavy drinking, so sign up for a church or rec league that plays in the evenings and disrupts the drinking habit.
Ultimately, you have to find something that's more important than the drinking. I have been to Saturday night cocktail parties where you would think that I would allow myself a little extra intake because of the special circumstances, but the reality is I have one or two beers and then at 10pm I switch to water because I am hydrating for the 12pm Sunday basketball session. I don't leave the party or anything like that, I just put the basketball at a higher priority than the beer and act accordingly.
The last suggestion, wrt to your DUI concern, is that there are personal breathalizers out there that you can pick up and keep in your car. I have a buddy who I wouldn't call a heavy drinker, but not a lightweight either. He picked one up and swears by it. It's a nice objective measurement of your status instead of, "I feel ok to drive." If he blows over the limit, he picks up the kindle and just reads in the car for a bit. I'd post an amazon link but I don't know what make/model he uses and I don't have one myself to recommend.
Sorry for the wall of text, Keith, I hope there's something useful in here for you.
Cheers,
CJM