One of the best tips I learned from my personal trainer was not how to make my butt smaller or arms more toned, but rather to use a shower cap when I am pressed for time at the gym.
It's such a simple idea, not to mention very inexpensive, but it does wonders for cutting down my time in the locker room. If you're like me, and blow drying your hair is just not an option, using a shower cap while showering allows you to really get under the water without worrying about getting your hair wet. Afterward you may want to run the blow dryer through it to smooth it out and get the parts around your neck and face that may have gotten a little damp, but it's nothing compared to drying your whole head of hair. The best part is that I always ask my husband to bring shower caps home from his hotel room when he is on business trips so I've never had to buy one. And one shower cap lasts a long time.