Nick Zukin, aka ExtraMSG, has created this great restaurant and market resource for newcomers and townies alike.
The tip sheet breaks restaurants down by style (American, Bakeries, BBQ, Breakfast, Chinese & Korean, Chocolates, Desserts, French, Greek & Middle-Eastern, Hamburgers, Ice Cream, Indian, Italian, Latin-American, Mexican, Mexican-American, Northwest Cuisine, Pizza, Seafood, Special Occasion, Sushi/Japanese, Thai, and Vietnamese) and by neighborhood (downtown, the Pearl, NW, NoPo, Inner NE, Restaurant Row/28th/NE, Sunnyside SE, Division/Clinton SE, Sellwood/Westmoreland/John's Landing, outer SE [82nd & Montavilla], Vancouver, and Westside/Washington County), and markets by category (Asian, Farmer's, Gourmet/Organic, Latin, Meat, and Wine).
He has links to online resources, listings of under- and over-rated restaurants, and perhaps the best thing: a list of Sunday and Monday options. The latter I go back to again and again.
Here's how he describes it.
This tip sheet is primarily intended for people who are new to Portland or just visiting and want a few quick recommendations. It may also be useful to people who are looking to explore a cuisine for the first time or who don't get beyond their own neighborhood often. It's not meant to be comprehensive. Nor is it intended to always give the best three in each category. Some restaurants may be both among the best American restaurants and the best breakfast restaurants, perhaps. However, they will only be listed in one category. Also, there is some attempt to add variety in each category, giving both upscale and downscale options, for example, or variety in location or style. However, each should be among the better, and possibly best, choices in Portland for that category.