All my life I've had a little heel slip in my shoes. It seems like the first area to wear out would be the inside of the heel. I figured it was just the way my feet were shaped and didn't think much about it. Until now. It appears I've been lacing my shoes wrong, which allowed my heels to slip.
Check this out: http://www.newbalance.com/lacing-guide/
There are several different lacing methods given to deal with many different fit issues. For me, I just needed to create a lace lock. I tried it out last night and what do you know? Heel slip was greatly reduced.
Ran 4.5 miles last night, about 6 planned for tonight. Wet, dark and cold weather. Very typical November weather for my part of the world. Tonight the rain may turn over to snow while I'm out there. I'm not particularly concerned about it. It will be my first snow run of the season if it happens.