Think about things you like
Take a class or pick up a hobby
New shoes (I LOVE shoes!!!)
Buy a good facial steamer and learn to give yourself facials
or go out and get one and get spoiled
manicures
pedicures
massage
new candles or aromatherapy stuff
take a day trip or a long scenic train ride and appreciate the view
clothing
makeup
bath and body stuff
buy a new painting
every pound lost put $X aside
and then after you reach mini goals go spend it
New book
CD
DVD
Computer program
go out to see a movie
Theater tickets
Go dancing
start a collection (dolls, coins, vintage art etc.) keep adding to it as the weight loss progresses
I know someone who started a christmas village and every week as long as she dropped on the scale she got something else to add to the village and now its huge and takes up an entire room.
Can always get a new bra or panties or something sexy
something that will make you feel better about your weight loss

not to mention seeing the scale go down is a reward in and of itself.

Good luck,

MJ