Depends on what your goals are.

Those are the best. I like a little caffeine and Ephy to get some motivation on days I am dragging.
A multivitamin helps nice.
The prohormones are not bad, but they are as expensive as regualr juice.

As YJ said, it depends on your goals. Protein is your building block for muscle, so that's a must. I prefer Plasmavol over just straight creatine. It's a creatine, glutamine, alpha lipoic, dextrose blend. It will give you a nice little kick for the gym. If you're looking to lean out, you'll need to focus on your diet more than anything. If you want a little extra help, you can always use a fat burner such as the ECA stack. Again, it really depends on your goals.