It would be difficult for anyone to summarize northwest fishing tactics on a forum like this. But you could...
1. Take some time and read through this board. Most of your questions have likely been answered at one time or another.
2. Pick up a book or two on the type of fishing you want to do. Get it at a decent sporting goods store and ask questions of the staff.
3. If you have the money, go on a guided trip.
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If anybody needs me, I'll be on the river.