Write down and or record your ideas you come up with? I find if I don't do so I can forget them pretty quick. I am good about remembering the fingerings of the riffs but the tempos can vastly differ (which can be cool too as it opens up other doors sometimes). I got back into stockpiling riffs and playing times again and it has helped me to focus and be more productive and putting music together. Who else does this? What are some things you do? Or...do you just sit and chug / noodle riffs for 8 seconds at a time?