I suppose it depends on how you want to sell them; word of mouth, craft fairs, online?
If you want to sell by word of mouth, I'd just make the stuff you enjoy making. Give away a few to some friends or guys at work. It won't take long before you're getting orders and you can start charging. But if you're doing it casually, just make the stuff you want to make. Otherwise, it becomes work and you won't enjoy it as much.
If you want to sell at craft fairs, I suggest going to a bunch to get a feel for what's popular in your area. Each area has it's own vibe and what people want to buy. Coastal towns like lighthouses. Places like Montana might like wildlife. Urban might appreciate portrait more, etc. This way you can get a general idea of what people like and when you come across a project/pattern that might fit, I'd go with that. But for some basic suggestions: Simple wooden toys, mini-clocks, puzzles, bowls/treenware, custom orders for portraits.
Online, you'll have to do some research too. Etsy.com is by far the most popular. It takes quite a bit of work to keep it going as you'll have to network, come up with new products regularly, and list new items often. You'll have to focus on what sells that takes the least amount of time. Natural toys are hugely popular (look up Waldorf toys), anything to do with pets/dogs, home decor, and seasonal stuff.