The bassist in my band went out west for like 6 months, so I haven't been gigging at all. In that time, I've decided to learn the most impossible guitar solos that I love, regardless of how long they take for me to get there, or whether I'm capable. It's been awesome. So far, I learned a ridiculous 2 minute blistering solo of a prog metal band, a Marty Friedman solo from Megadeth, and currently working on a Zakk Wylde solo from his Ozzy days. I get obsessed when I can't do something on guitar, so that drives me forward.