OK, here's my tip...

I wasn't on hiatus for several years, but my guitar playing was really in a rut. After playing for 30 years I probably hadn't added anything new in the last ten. So I took a desperate plunge: I took about ten lessons on bluegrass style guitar and started learning fiddle tunes as guitar instrumentals. Although I got a few sideways glances from my folk friends it gave me a quantum leap forward in my versatility. Now that I'm back to mostly folk style and finger style guitar, I still use those fiddle tunes for warm-up and an occasional change of pace. Took my lessons from Adam Granger, picker for the former "Powdermilk Buscuit Band" of Prairie Home Companion fame. If you live in Minneapolis-St. Paul area, he's available...and great!

Also...when warming up and getting those fingers back in shape, try a chromatic scale up and down the first four (three) frets of each string. If you make sure to follow the positioning of first finger only on first fret, second finger only on second fret, etc. you can get some good stretching exercise. And concentrate on clean, precise sound. Hope it helps. Angus