Well, being as I'm 15 I had to go cheap. But I think I did very well.
Early this year, October, we went to DisneyWorld for my mom's 50th birthday. She loved the trip. So I got her a picture frame with five places for pictures and put five pictures from the trip in there. She really liked DisneyWorld so I hope I did well. All under $20.
Otherwise my dad got her earrings and my sister (24) got her perfume, a crossword puzzle book, and something else that I can't remember.
Now I feel like a cheap ass compared to some of these posts. But then again, I don't have a job.
Perfect gift, man. You may be razzle-dazzled by the expensive gifts others got their mum or dad, but they'll forget who gave them their presents in several years, while yours is more personal and will stay with them for much longer.
I got my mum a Photobook via iPhoto like I do every year. She loves getting photos from me because I took them.