Where are you staying?

2nd Ave Records is great, downtown.
Mississippi Records is in N PDX.
Everyday Music is on NW 23rd and is in a neighborhood with lots of other stuff

Check out Stumptown coffee.

People have listed some great eats. To add to those... McMeniamins (several) has okay food, but great beer (try a ruby, then a terminator, then a rubinator). Hawthorne, Alberta, Mississippi, and NW 23rd and the whole pearl neighborhoods are good for walking, drinking and checking out random stuff.

Eastside Voodoo Donuts... Don't waste your time downtown.

Thai food... Pok pok I'd great but the wait is stupid. Thai Ginger is great and no wait.

Pizza... Sizzle pie is great as noted above. But... Oasis Pizza on W Burnside is great slices, Ken's Artisan is great, my favorite sit down and eat a pie place is Amalfi's on NE Fremont. Portland is surprisingly a great pizza city.

Rogue Brewery. Do it. You won't regret it. Sample everything. Hopworks, ditto. Mcmenimans as already stated. Bridgeport is good too. Pro tip... McMenimans and Bridgeport are both on Hawthorne.

Shopping down town is great.

If you want a Adidas employee pass let me know. It expires 1/31 though. 50% off retail only can get in with a pass. Nike passes are hard as hell to get.