a little bit of glove oil, a lot of catch. My favorite is to take the glove to the batting cages and fire up some fastballs. This can be expensive, but you'd be amazed how fast a few 65mph balls will break in the pocket. If the high school has a machine this is perfect.
a few key points:
- with any type of oil, shaving cream etc, less is more. Don't over oil your glove.
- don't buy any of the oven treatments. bad, bad, bad.
- Although I don't like the bucket of water or (especially) putting your car on the glove, you'll find major leaguers who do it and it's sort of tough to argue with them...basically there is no right answer to this question.