I guess I'm lucky that I didn't start with a pick, because I forced myself to learn playing using my fingers. In that respect, I never really learned how to use the pick effectivly and am sloppy as poop on glass when it comes to where it's going and when it will hit a string.
When I started out, I would actually do triads and basic chord progression (Like a 10/12 bars blues) with different rhythm patterns. Like 2 eight 1 quarter 2 eight 1 quarter. Flop it around, come back do eight patterns and then maybe all quarter. The key for me when learning something new is to keep it fresh. I rarely practice (this also is a weak point for me) things using scales. When you're bopping around on chord progressions, atleast you can imagine that you're playing with people and it's not too boring.
As I've been working on picking since I injuried my index finger, the best advice I've gotten was from my guitarist that said "Don't learn anything new. Only play songs that you know and you know what they should sound like." I mean, for most of us, we've spent years making our own style and to lose it just because we've switched from pick to finger or finger to pick seems to be a sin

Also, since you already know what your left hand should be doing, it leaves you all the attention you need to focus on that right hand and fingers.
So in short.... what abark said
