Or even listening to something that you havent listened to for a while - even years to gather ideas or stuff you normally wouldnt listen too - Something out of left field, Ive got a secret obsessions with Rockabilly, Guitar Shreddly Shreddly and some Pop music.. keeps me sane when my normal list gets a bit repeative... Even different group of the styles you listen too. Even finding who your favourite players players were back in the day - if you dont already know and listen to them - and get some of their stuff.
Having a good listening routine (Having big, vaired playlists help) can help give you more ideas than you normally wouldnt get.
I think having fresh and open ears can keep you as fresh as practicing odd things.
I have a few Paul Jackson lines that I always rattle through at Music stores to give me an idea of the differences in gear but I try and vary my practice as much as I can. Some days I'll sight read, most of the time I'll play along to song I know and songs that i'll play along to on the fly, transcribe tunes occasionally (Not as much as I should) and then do the basics - Scales, Arpegios, Rhythm work occasionally too. Its just finding things that make you want to play more and improve yourself.
Lessons with a GOOD teacher can really help too in a big way - you'll get more out of them if you have a good idea of what you want to achieve.
Lessons with bad teachers can drag you down even further.. I came close to quitting playing because of one particular teacher I had.
Sorry, its pretty vague but might give an idea or two.