Safeway (groceries) - 1025 SW Jefferson Street (very close to PSU)
Green Zebra Grocery (groceries) - 1704 SW Broadway Avenue (at PSU)
Target (clothing, electronics, food, etc.) - 939 SW Morrison St (near PSU)
Whole Foods (healthy grocery options) - 1210 NW Couch Street (across the street from Powell’s Bookstore- you can get here by streetcar)
Ross (clothing) - 700 SW 3rd Ave (downtown)
AAA travel store - 600 SW Market Street
It's important to check the coverage that your plan will have in your host city. Make sure you will have good coverage in the place you are going to live. That may determine which plan you choose.
Cheap options, but with limited coverage - you'll probably need to order online
Major companies with good coverage - you can visit these stores near PSU. All of these companies offer plans with or without a contract.
T-mobile - 635 SW Alder Street
They have a 3-week tourist plan for $30 that could get you started
Verison - 616 SW Broadway Avenue
They have an international student plan
Waterfront Post Office - 101 SW Madison Ave.
Central Post Office - 204 SW 5th Ave.
UPS Store - 1819 SW 5th Ave.
FedEx Print & Ship Center - 1400 SW 5th Ave. Ste. #110
All you need is a valid school email address.