DIY VICTORY!!!!!

Since the day we moved in we have had trouble with the upstairs showers. Martha and I's showers did not produce hot water at all with no hot water pressure. The boys shower produces very little hot water and little pressure, but still usable. With extensive internet research and a lot of frustration I fixed the problem all by myself!! There is a valve inside the fixture that had gone bad since the house sat empty for so long. After I took it all apart and pulled and pulled and finally got the old one out, I installed a new valve and voila! Victory! I now have a functioning shower of my own with hot water and everything. I am quite proud. I am the kind of person that when I start something I have to finish or I go berserk. After my 9:30 pm trip to Lowe's I now am a plumbing expert. Ok, maybe not an expert but I can change a valve. One down for tonight and two to go for tomorrow. My husband would be so proud. And I can sleep nice and easy knowing that I figured it out and fixed it. What can I accomplish next??