A pack towel is a great idea and I just happen to have a few micro fiber rags around here that would do just the trick!

Spare glasses is really a bad name I guess...I wear contacts and the glasses would be backup in case I had problems with the contacts. I do need to find a smaller case to store them in, the one I have is bulky. I suppose a spare set of contacts and a small mirror could work just as well and be much smaller/lighter if I can find a decent mirror so I can put them in if needed...ill think about this one.

Never heard of buffs, I'll check that out. Thanks!