Yes, I know exactly what you're talking about. This feeling is exacerbated due to the fact that I'm in graduate school (I finish in 3 weeks!!!). What I have decided to do is embrace minimalism to focus on what I really want to do. I've sold off a lot of my stuff to start with. I've also "locked" my to-read, to-watch, etc. lists. I am going to take all the books, movies, games and albums in my place that I have never started or finished, finish them and then probably get rid of them.
As far as things I want to learn goes, I'm going to try to take them one at a time. I want to get a certification, so I'll focus only on that until it's done. I want to become fluent in Spanish, so that'll have its turn. It might not always work out that way, but it's worth a try.