Learning new skills is a great opportunity that requires specific training like classes or workshops. However there are so many things to learn that you'll probably won't have enough time and money...
|Learning multiple instruments is a good example of reusing skills to learn faster and better understand music in general|
Bridging the gap between what you already know and what you want to learn will help. No matter the domain, you should be able to find links that will help you learn faster and smarter.
Try it next time you learn something, build on top of your current knowledge to reinforce what you already know as well as learning new stuff.