Personal training is a great way to learn how to exercise, push yourself, and focus your fitness. If you have the time and the money, go do it! Add it to your normal fitness routine (or use it as a jump start!).
However, there is another option. Many places are offering small group training. You train with a personal training with 3-5 other people with similar goals. It is fun and more economical. The Fitness Center in Champaign offers Pod Training for groups at about $15/session/person (which is half the individual rate).
Think about getting a couple friends together and working out together...motivating each other, laughing with each other, getting in shape together. If you are getting married, round up your bridesmaids or groomsmen! If you are in a weight-loss group, get together to work on your goals!