You have had your pre-workout coffee, you've analyzed the workout and, fully prepared, are ready to attack! Except that when you arrive at the gym it packed and there isn't a cat in hells chance that you can compete it in the order described.
Choosing a personal trainer
Deciding if you need a trainer
When it comes to helping people who are in two minds about whether to employ a personal trainer I always say the following "If were seriously sick would you see a doctor or use your own medical training to self-diagnose?" Obviously anyone who isn't a doctor would prefer the former. On a more basic level the same can be said about personal training. Unless you have had training as a fitness professional you are probably not in the best position to advise yourself about how to best maximize your training results. Often gyms have fitness instructors who can design a basic program but they won't be there to make sure you keep the right technique and intensity.