This thread is full of a lot of superstition and pattern-seeking psychology.
There is nothing wrong with positive thinking...but there is something wrong with being results oriented. Allow me to explain:
There is no such thing as "luck". It's just pattern-seeking human psychology, when witnessing Variance (a mathematical term, and a quantifiable thing). People always want "good luck", and have all kinds of superstitions surrounding it, but in reality they can't control it with superstitious, or New Age, methods. If you want "good luck" (favorable Variance), I'll give you a formula - and it won't require you to study Standard Deviation, Variance, or other mathematical concepts.
"Good Luck" = Opportunity + Preparation + Well-Timed Aggression
Opportunity is a function of Variance, and over large sample sizes (and I mean immensely large) it evens out. You cannot control Opportunity via positive thinking, prayer, seeking certain numerical nonsense patterns via your psychological tendencies and re-affirmations, etc. Opportunity is what it is, and nothing can be done about it.
Preparation is completely under your control. Well-Timed Aggression is completely under your control.
Let me give an example from the real world:
I play poker for a living. Over 1 million hands, things pretty much even out (the upswings and downswings will likely, and to a high degree of probability, even out for no matter who plays this number of hands). That doesn't mean everyone who plays 1 million hands of poker will end up with, without, the same amount of profit, loss, or broke even. It means that if two players of equal play style faced 1 million hands, they are likely to get the same number of straights, pairs, etc., and vs the same number of opposing hands, which means bad beats and big coolers in their favor, or against them, will equal out, and it will be fairly equal for both players.
That may sound complicated, but it isn't. In the short run, anyone can win at poker (as Variance, or "luck", determines more in the short run). In the long run, the results are heavily determined by Preparation and Well-Timed Aggression. If you, as an amateur, play 1 million hands, and I, as a pro, play 1 million hands, I will win more money than you (and you will likely lose money). "Luck" just isn't a determining factor in long runs. It only matters in the short run.
If our lives were infinite, then Variance would even out for us all. We'd all have our fair share of Opportunities. But we don't live forever. Some people get unfavorable Variance ("bad luck"), like childhood cancer, or auto accidents not of their own fault, or attacked by a criminal, etc. This can be determinate to outcome in the "game of life", but only because life is a small sample size, relatively. This makes Preparation and Well-Timed Aggression even more important...because even though Opportunity is more determinate than in larger sample sizes, IF you get an Opportunity you absolutely MUST be prepared and act on it with good timing and aggression...otherwise you may not see another Opportunity.
If you want "good luck" in life, you can pray, think positive, etc. all you like...it may make you FEEL better. You may even convince yourself it works, as pattern-seeking human psychology makes us see patterns we are looking for (consciously or subconsciously). We tend to remember that which re-affirms our already established believes, and forget things that go against those beliefs. It's the same way our brain looks at clouds and says "you see that X in the clouds?"..."That's a total X in the clouds!". Someone else may see nothing, the same thing, or something different...but in the end, it's just a fucking cloud. You see what you want to see...patterns of familiarity. Mythologies, religions, New Ageism, etc. are all built on this type of psychological phenomenon.
Real life "good luck" is only to a degree under your control (because life is a small sample size). The parts you can control are preparation and well-timed aggression. The good thing is, during the Roman Empire life expectancy on average was early 20s...so we today have much more control over our "luck" then people of the past (as we live longer- extending the sample size). The bad thing is, someone born with more opportunities than you will likely succeed with less preparation and less well-timed aggression....but if you motivate yourself enough to prepare more than them, and practice timing of your aggressive moves in life (and I don't mean aggression in the NAP sense - I mean in terms go-getter attitude, and being less risk-averse) more than them, then in the end you can end up just as successful (or more so) than them.
You can think positive all you like, or as little as you like...it's not that which makes you a success or failure. It's preparation and well-timed aggression, and the uncontrollable opportunity. Control what you can, quit worrying about what you can't control (and don't pretend you can control it). Superstition gives you comfort, but does nothing to increase "good luck".
And being results oriented is bad. In the short run, you can do all the right things in terms of preparation and well-times aggression, but still get bad results due to Variance. You wouldn't want to change your tactics, as they aren't the reason you failed. In probability, you need to think process, not results. If something is +EV (positive expected value) over the long term, don't get results oriented when you run really bad, or really good. Gain satisfaction from doing things right, regardless of how they work out. In poker I can play a hand perfect for moths and keep losing, and I can play the exact same way and win big for a while. What matters is if my moves are +EV...will my moves make the most possible profit if I did them 1 million times. That's how I determine whether the move is right or not, not by results in the short term. I don't get too high when I win, and I don't get too low when I lose...I take satisfaction from playing the hand correctly, not from the result of correct play. In the long run, I'll win if my moves are correct (and I have been for years).
Never look at short term results (that may or not feel short) as important. It was cause you to become risk-averse, and therefore make your well-timed aggression badly-timed passivity.