A quick tip about painting:
The next time you paint a room in your house, don't just save the extra paint in the original cans in your basement or garage. Fill a small jar or similar container with a small amount of the paint. Don't forget to label it! If the wall gets scratched or damaged in some way you can quickly touch it up without having to open large paint cans.
I also find it useful to keep a log of when rooms are painted and the exact shade of paint used to paint them. This can really come in handy in the long run!