That's my problem. I get into such a comfortable rut as far as learning things, when it gets to the point that I'm just so used to all the tricks I have that I'm afraid to go outside of my comfort zone, it actually helps to just take a break. Come back in a week or two and you won't be as comfortable as you were with all your tricks before, and you might even lose some. But for me, that was the motivation that I needed to start learning new tricks. And once I start learning things, I learn a shitload of things at once because I'm constantly pushing myself out of my comfort zone. Basically, once you start learning new things, don't stop. And if you fall, never just let it go because you'll fuck yourself out of the trick/obstacle you fell on for a long ass time. Get back up and land it.