I've noticed that my hands aren't as steady as they used to be and if I'm trying to anything involving super tiny items, like watch parts, I can't just place things where I want to. I have to sort of poke around until I hit the right spot. I'm turning 40 next year, which isn't that old. I also don't think I'm nearly as smart as I used to be. Where do you draw the line between just getting older and something might be wrong?