1. Motivation
Any good trainer works out and regularly achieves results of their own. They should tell you what they have been doing, any obstacles they have had to overcome and their results that have come out through it all.
2. Consistency
A personal trainer should be reliable and flexible to accommodate your busy schedule, guaranteeing as many workouts a week that you will need to reach your goals.
3. Effective programs
Personal training is more than just telling you what exercise comes next. A trainer has to consider your goals, exercise experience and limitations to design a program that is custom made for every individual. This involves research and trying it out on their own to make sure that it's hard enough for progression but also safe.
4. Proper technique
A trainer knows and studies technique and brings this knowledge in to training sessions to prepare you to work out on your own. Too many people go in to the gym without the full picture of how an exercise works and how it is properly preformed. This leads to injuries and delayed results.
5. Results
A trainer wants you to reach your goals and will do anything and everything to get you there. Your success is the trainers success.
This time hire a personal trainer if you are serious about achieving your goals as quickly and effectively as possible.
Source:
http://www.kalisthenixfitnessblog.com/2009_02_01_archive.html