Resistance band workouts are best when they have a focus.
There are several ways to design the ideal workout with resistance bands for your needs, depending on what that focus is.
The first and most obvious focus is a particular muscle group.
The most common are probably the simple breakdown of upper body workouts and lower body workouts, alternating between them each time you work out in order to get the best full body workout overall, with the one section resting, recovering, and rebuilding while you take the other through its paces.
Other workouts that focus on specific muscle groups are: arms, back, shoulder, chest, waist/hips/buttocks, and legs.
Another way to design the optimal band workouts for you is to focus on the activity for which you're getting in shape.
Runners, for example would do a different workout than swimmers, runners using the bands to strengthen their legs and swimmers doing exercises to strengthen the arms and shoulder girdle.
Both, of course, require endurance, which resistance workouts can also provide.
Likewise, football players who require full body strength would do different resistance workouts than basketball players who need to be toned and lithe.
Both, of course require speed, which is also something resistance workouts can help with.
Speed and endurance, strength and toning - all of these qualities can be achieved using the same deceptively simple devices.
Resistance bands are not only among the most portable strength training products on the market, they're also among the most versatile.
There isn't a muscle group on the body that you can't get in shape with some kind of resistance band workouts.