I made my mom a small giftsbasket once... she loved it!
maybe you should try something like that..
If you can cook or bake you could always make something
Breakfast in bed
Mother's Day coupons - a small notebook and write the coupons in there, or cut out little hearts and write the messages on them e.g. Wash dishes, set table, hugs, a kiss, clean my room, do the laundry one hour of quiet time for mom to enjoy a relaxing bubblebath, one whole family-free afternoon, one free car wash, a couple of hours you'll spend time with her...
Gift basket - chocolate, movie she'd like, bath products etc
http://familycrafts.about.com/cs/mothersday/a/040901a.htm - more ideas