Various other tips about the Graph Editor.....
1. Each point you see on a curve in the Graph Editor represents a key.
2. With objects that have both X,Y,and Z cordinates keyed, too many curves can make it difficult to modify animations. To View one curve only, simply select one of the Translate, Rotate, or Scale views on the left. You can Control+Select multiple views as well.
3. To loop animation, select the animated object, then choose Curves>Pre Infinity or Curves>Post Infinity and select the type of loop you want.
4. Sometimes, animations can turn out to be too, well... curvy. If you want an aimated object to run from one key to another in a straight path, select the keys (points on the curves) in the Graph Editor and select Tangents>Linear. There are a number of other options under Tangents as well. Clamps help with walk cycles.
5. If you select a key in the Graph Editor and have the Move tool selected, you can move the entire key up or down on the grid with the middle mouse button. (selecting JuSt the key - not the handles of the key)

Well, you might or might not have known any of that, but I guess if a noobie runs across this thread, he or she will now know something new.