How can I make my mom happy?

So u see, last december my mom and dad started having "issues," and now their working out their divorce. I love my mom, and I always want her to be happy. Lately, I see her worn out, and she's not joking and as bright as usual. I want to do something to make her day. I'm an over achiever, so I am up to pretty much any suggestions. This is really important, so please answer... Thx~