Left hand finger stretching exercise

Here's a simple stretching exercise that really helped me. Remember don't push your fingers too much, just enough to feel them stretch, never to the point of pain. If you do feel pain then stop and continue the next day. Better to rest one day than to have to stop all together for several weeks because you've torn ligaments and tendons, right?

A few rules to follow with this exercise:
1) Keep your fingers on the fret board at all times. Don't "pick up and put down" any fingers.
2) Keep your fingers as close to the frets as possible. It'll be hard to do when you go to move finger 2 (middle finger) because it'll want to drag finger 3 (ring) with it.
3) This is a stretching exercise so sound is not that important. Don't get hung up on fret noise or if one string doesn't sound 100%. Get the fingers on the fretboard and just do it.
4) As the exercise progresses down the fretboard the harder it'll get because the fret spacing is wider. Hang in there.
5) Good luck!