Focus more on the lowering part of the Mass Extreme Review lift: So many people are so concerned with trying to get the weight where they want it to go, that they seem to completely forget why they're actually lifting: To get bigger muscles!! The more you use momentum to help you get the weight up, the less muscle you are using. Furthermore, lifting heavier weights with bad form is not nearly as good as lifting lighter weights, the weights you should be using, with proper form. Also, the eccentric (lowering) portion of the exercise is actually more important than the concentric (contracting) portion.
For example, the eccentric movement in benching is when the weight is being lowered and in lat pull downs it is when the bar is moving up. It is during the lowering part that your muscle fibers actually rip, thereby allowing them to be healed and grow even more. When you lift you want to make sure that you can feel the targeted muscle(s) burning; if you can't, then you might need to adjust your form a bit. Common examples of this are abdominal exercises. Many people tend to bend their waist instead of their midsection and end up working their hip flexors more than their abs.
Do Kettlebell workouts: These involve ballistic exercises that combine cardiovascular training with strength and flexibility. They are intense and engage the entire body at once.
Practice good form, learn how to do each exercise properly (full extension of movement, proper stance and posture, etc.) or else you'll not only reduce the effectiveness of the movement, but you'll also be increasing the risk of injury.