Problem: Keeping a grip on the phone. Solution: Paint the case.
I wasn't sure where to put this, but since it involves a case, I figured the Accessories forum was a safe bet. Like most folks who pre-ordered from Sprint, I received a free case as a little thank you for being patient....even though I wasn't.
After a few weeks, my only complaint is that the case is very slick and I've had a couple of close calls when trying to get it out of my pocket and answer a call while in a hurry. I remember seeing someone mention a product called PlastiDip, which is a spray-on coating designed to add texture and some degree of weather protection. I found a can at the local hardware store, slapped some masking tape on the edges of the free case and this is the result.
Here it is with just the tape.
This is after 4 medium coats of PlastiDip with 30 minutes between coats.
And here it is after scoring along the tape with a razor blade and then removing the tape.
I'm not sure how long it will hold up, but it really added a nice grippable feel to the case. Don't look too close or you'll see that I didn't apply the tape parallel to the edge of the case. I also didn't do a really good job of scoring along the edge of the tape. However, the case was free and the spray was only around $6 so I don't have a whole lot invested. If anyone else has similar problems holding on to their phone, this might be an option to consider.
For reference, this is the stuff.