What should one do untill Spring?

If you have a returning team, work a "Think-Tank". Talk about new systems that you would like to do this spring, get feed back. Have you team spend time together off- season,& off of the field. This works wonders. Exercise is good , learn you players. If you don't have a returning team, then do things to make you a better coach. Brush up on coaching "knowledge" via internet or book stores.