My Top 5....

......things I wish people would be doing more often in the gym:

1. Less cardio and more strength training for weight loss purposes.
   
2. More single leg training (lunges, step ups and split squats for example).
3. Warming up properly through dynamic flexibility/joint mobility type of routines.
4. Working through a full range of motion with each exercise. Either that or people are employing partial rep training techniques that I'm not aware of.
5. More foam rolling or other types of self myofascial rolling techniques. The density of your tissues is just as important as the length of the tissues.