A Good Leg Workout

When I go to the gym I split my workouts between upper body and lower body workouts. On lower body workout days I like to do leg extentions, leg curls and have started doing a workout similar to the following video in which you take some dumbells and step up onto a bench with each leg (one at a time). I do 10 repetitions and then increase the weight. Here is the video....

I train legs about 3 days a week and I like to do leg curls and leg extentions on different days. A lot of times I notice people in the gym focussing their workout on upper body and I hope people do not neglect their leg workouts.