Another "less damaging" strum technique is to not hold your hand (and the pick) rigidly at right angles to the strings (even with only a 1/$' sticking out), but rather rotate the wrist and the "attack angle" of the pick so that it hits the strings at an angle: \ or / not |
Play slower - don't necessarily try to keep up with a bunch of speed deamons. Develop your speed in your own time, don't be pushed. Better to play slower and correctly than fast and sloppy...