I have the guitar aerobics and use it intermittently, seems just when I get a groove going on the book something happens and I slack off for a few weeks. I'm really not good at just straight up practicing scales and such.....find them boring.
For me, I feel the fact that I play mostly fiddle tunes (for some odd reason....
) I get more than enough practice on finger dexterity. I have periods where I play with alot of hammer-ons/pull-offs and other times I focus on cleanly flatpicking each note of the tune and work on speed.
The other day I was lamenting to my instructor that I can't "play faster" and he gave me the old playing fast is overrated talk and then gave me a few exercises based on the pentatonic scale. Well, they turned out to be exactly the runs I have been playing in tunes like St. Anne's Reel, Black Mountain Rag, Whiskey Before Breakfast, Billy in the Lowground and even Blackberry Smoke's "Good One".
I also grab my guitar when watching a movie or football and practice picking with my right hand to get faster and again mostly just playing the fiddle tunes I know. They are great at getting you moving top to bottom and up the neck a position or two.
I went to see TSO last month and wanted to learn how to do the "O Holy Night" lead guitar. To my surprise I was able to play it pretty well - not at Al Pitrelli's speed of course but passable for just a few hours of practice. It reminded me of the time I was talking to a woman who did alot of rock guitar gigging - she asked me what I play and such and I said "oh, just fiddle tunes you know nothing great"........
. She laughed and said that she thought they were good songs to play to practice flatpicking as it crossed over into rock guitar leads......I had never really thought of them that way........
So my long windy reply boils down to for me - I get to play and practice at the same time.