FOREARM STRENGTH
Heres a tip a coach told me about quite a number of years ago. This drill can increase your strength in the hand, wrist, and especially the forearm. Using this exercise really helped me in my pitching.

Put a pile of single sheet newspapers in an area you would normally walk by the most times during the day. Every time you walk by, grab a sheet and wad it up, using only one hand. This is the kind of exercise that you hardly notice doing after awhile.

Submitted by: Don Edwards