I used Palmer's Organic Massage Cream for Stretch Marks...

...and I didn't get them!  Now I know a lot of it has to do with genetics (My mom definitely has them!)  and other factors, but I swear by this lotion.  During my pregnancy, I rubbed it on everyday before I got dressed.  Even if it didn't work, it smells so yummy that I would use it anyway!
I also used the Palmers Cocoa Butter Sunscreen Lotion during the summer whenever we went to the beach.  They come in pump bottles that I put right next to the shower.  My husband has always used Palmers for scars, so he initially pushed me to try it, but now I'm in love!