Winter is a great time for interior home projects. All those things you noticed during the summer that you couldn't quite get to, now's the time.
Replacing light bulbs
Cleaning the insides of windows
Changing out your faucets and shower heads to low flow
Touching up the trim that's has been dinged up
Deep cleaning your carpets
Painting rooms
Organizing
These are just a few ideas of things to do when cabin fever starts to kick in. With the shorter days we spend more time indoors and by just doing a small project or two you can start checking those things off your list. 
