Try these things to get yourself back into the scrapping mood or out of a rut:

Get some fun, new supplies
Go to a crop
Go to a class
Check out the gallery
Get a mag or book that has different stuff than you have done before
Do a challenge on here!
Scraplift someone's LO you like but isn't your style
Try re-sizing your pics to get a different perspective
Organize your supplies to remember fun stuff you already have
Try using a sketch
Make a day of it--get yourself a Starbuck's coffee, turn on some music, and scrap away.