Great suggestions so far!!
Based on my personal preference, these are what I like most in a headshop:
Glass blades - those things are so hard to find (at least in my area)
Good selection of papers - lots of flavored, lots of non-flavored, and different sizes. Headshops seem to carry...
I'll admit it, I've smoked resin from my pipes many times.
Don't make it a habit and I don't save the resin when I clean my pipes. But there have been times when I've been out of weed and I'll get a quick high from the resin. It's a crappy high and doesn't last long. Boo.
Mmmm, smoking and fishing are the best!!! I have never caught a fish - and I've been going since my dad used to take me when I was young. But it is still one of my favourite things to do. Just so relaxing :)