SeattleRainyDay - are you asking about where to stay overnight at the coast or just asking where to stop and eat/visit/shop?
If you want an overnight suggestion, McMenamin's has just opened a hotel at Gearhart (north of Seaside). Haven't stayed there yet, but we love all the other McMenamin's locations, particularly Grand Lodge and Edgefield. Always funky, always relaxed, not pretentious. Many places at the coast have a 2 or 3 night minimum, but from what I see online, this doesn't apply at the Gearhart Hotel.