I do the leg press, where you lay on your back and bring your legs down to you. It depends on what phase of the weight training program, but I do calf raises, hamstring curls, leg press and squats. The key thing that's important throughout is form. As long as I can hold the form, then I can increase the weight. But you don't let your form slip.
Form is one of the most important things in weight training.
I really enjoy training with other people. We don't train with our team because we're all kind of spread out. I like riding in groups, and the area I live in has a phenomenal set of training rides. You can do a group training ride in the morning, a group ride at lunch and group ride at night in the summer. Group training motivates me.