I have fall back material
I also am always looking for something new, believe me nothing gets you in a rut than the same ole stuff
I look for finger exercises books that are interesting or to make up my own
I find that finger exercises built off arpeggios do me the most good, Running them till they are sickening, but about a week or so later somehoe it pops into my head when I am comping and I find a use for this or that part of it, really cool, I also only really practice 4 scales but I always try to start them on different strings.
I also have old cds of music from when I first started, when I get kinda bored I go back and pick a song and tear it to pieces, well we learn every thing about the song, What you are doing is training the ear for new music and making it easier, by using stuff you have heard 10 gadzillion times.
I also collect like celtic, or african or caribean stuff and when I am bored can put some of that on and noodle
It all just keeps me involved, to many of the guys I grew up with quit after getting married, and now play an accoustic around the campfire with about 15 songs they know, I do not want to regress to that, this is my talent, I want to expand it. I may never get famous, but I can always say I never stopped doing what I love. And My 2 kids both play an instrument since they were in grade school. I am proud of that.