A phone call. And a card, if I remember to send one this year. I fogot completely about it last year! When I apologized (during my Mother's Day phone call) she hadn't even noticed!!!!!
At her request, we stopped with Mother's Day gifts a long time ago.
(I totally expect something from my kids and husband though!

)
Hubby usually gets his mom a plant, but since they will be leaving the province for several months shortly after Mother's Day, I don't know what he'll do. I'll bet he makes a nice dinner for everyone. (His parent live in our house when they are in this province)