Band-Aid came out with a new collection of bandaids espeically those who get blisters from their heels and flats etc. I bought a pack and it helps heal the blister while cushioning and protecting them. They're probably similar to those that
purexelegance was talking about.
I found my Keds giving me blisters in the beginning...but i guess i managed to break into them..cos i don't get them anymore..or at least I get a lot less scraping in the heal and toe area.
For pointy toe leather/non leather closed toe shoes...my friend read that you can wax the inside of the shoe first before putting them on. Apparently, she said it works..I haven't tried yet though. Just use a candle or sth and smooth it on the inside of your shoe where you usually get blisters.