What to do in the winter?

Many people are stuck inside most of the winter because it is just too cold.  What do you do then when you want to practice your swing but you can't go outside and you don't want to pay a load of money to go a dome or indoor driving range?  The first thing is obvious, find a wide open area such as a garage or basement and just practice swinging.  You don't even have to be hitting a ball to be doing some good for your swing.  Practice all kinds of swings such as your full swing with all your clubs and even practice some pitch and chip shots.  Secondly, the most overlooked part of practicing inside is the ability to putt.  You can putt year round in your house.  You just need a target and preferably tight carpet.  This is the biggest thing that somebody can improve on over the winter and it will make a huge impact on their game.