Jigs and worms are great baits, but don't limit yourself. I think of fishing baits as a tool box. I may be able to get by with a hammer and handsaw most of the time, but there are times when a wrench is the perfect tool. I constantly work on expanding my tool box and learning how to use each tool.
Each year, I pick a bait/presentation/style that I want to learn or improve. I might spend $30 on the necessary tackle and always have it tied up and ready to go. Each outing (if conditions are right) I'll work on the bait/presentation that I am learning or refining for a small part of the day. I have found that in the last few years, it has really paid off.
For example, one year I decided to focus on learning how to "walk the dog". I didn't catch jack, but I got real good at doing it. Now, this year, for whatever reason, there was a good topwater bite, and I already knew how to walk the dog.