From my experience at Las Vegas campaign HQ, here are the things that translated to success:
The GOTV (Get out the Vote) program was the ONLY focus. The idea is this -- first you go door to door or make phone calls to 'likely Republican voters' and make sure they have literature. This is handled precinct by precinct, with captains of each precinct responsible for reaching those in their own precinct.
HQ has packets on file for each precinct, they are lists of the 'likely Republican voters' in that precinct, plus other known Ron Paul supporters. Painstaking care is taken to ensure that there is no duplication of effort to each potential voter.
So the first run is to make sure they know about Ron Paul and have slim jims etc. The second run is a follow up to guage whether they are leaning to paul.
In the last week, phone calls and canvassing is done ONLY to identify EXISTING ron paul supporters. No advocacy or attempts to convince people are done at that time -- only making sure that all people who currently support Paul know exactly when and where to be for the caucus, and what to do there. This is called 'voter turnout'. Then, we have a good turnout, and folks know they need to be delegates for RP.
The other practice that I consider instrumental to our success in NV is that as soon as you walk in the door at HQ there to volunteer, you are given training on all of these details -- and the guy who gave the training was VERY capable -- his name was Ted, don't know the last name, but he had worked on many campaigns in the past and was apparently a master canvasser himself. He explained both what the goal was, and how to go about it -- and making sure we understood that it's okay to skip streets with only 2 houses on it, for instance, so they can be called instead for maximum efficiency.
The training was focused and relevant, and the process is time tested and organized. There was also very good communication within the office. The staffers there really impressed me, and anyone there to volunteer knew exactly what they were to do.