I've been nursing blisters ever since my 15 mile run on Saturday...
I joined up with a local Friends-In-Training running group and ran with the 3:1 interval runners for the first half of the run and then ran the rest (along their mapped out route) by myself. It was great to join up with them because they have designated water stations which means I don't have to run with a lot of water. The pace wasn't as fast as I would like though so I know I need to pick it up on my upcoming long runs.
During the 15 miles I ended up with blisters on my feet, including the bottom of my toes (which is as painful as it sounds)...