Skip the generic mugs and show your appreciation with a gift picked just for her: Whether it's something to make a part of her life easier, something she's mentioned wanting in passing, or simply something to make her feel like a damn queen, you can't put a price on everything she's done for you, but heartfelt gifts certainly help.
There are a lot of ways to show your mom how much you love them on Mother's Day, but nothing hits quite like a gift that's truly sentimental. You know, a gift that really means something. One that will cause your mom to get a little misty with just one look. (Gifting is the only time you should be making your mom cry, by the way. No sad tears here.)