What Should I Get for?....?

My girlfriend's birthday is coming up and I dont know what to get her, i mean, i already got her one gift...i need at least 1 or 2 more...she got me a couple things on my birthday...and im only 18, go to college, and work a part-time job cause of it, so i guess money's an issue lol....and also christmas is coming up, so a little help on that also would be great. Thanks a lot ladies and gents.