Can someone please explain to me why I keep buying so much stuff!?!

I got myself an XBox last week. It seemed like a good idea at the time. What needs to be mentioned at this point is, right now all of the XBox stuff is still in the box that it was shipped in. I haven't opened a single thing from it.

This is so typical. I buy stuff and then it just sits. I have no idea how many computer games I've purchased and either not played at all, or barely played. Let's do the list:

Rise Of Nations
Battlefield: Vietnam
Simcity 4
Star Wars: Knights Of The Old Republic

Now how about other computer related stuff:

Logitech racing wheel (third one I've owned)
Logitech flight stick (yup, still in the box)
LCD monitor (currently collecting dust in my office/closet
The Ripper (why did I think I needed a tower computer with no purpose beyond copying DVD's?)

At this point I would like to solicit some advice on how to not spend my money so foolishly. Can anyone suggest some strategies that might keep my money in my pocket more often?

Thank you and good night