Oh boy...you'll get almost as many opionions on this as on how to run a reef tank
Get your financing in line before you go looking. If you are looking at a previously owned home, the good ones at a decent price are not staying on the market long these days. Sometimes there are offers on them the first day of listing! Make a list of wants and want-nots and stick to it; the house you are looking for is out there. Don't let your realtor push you over your price line; they'll try. Unless King County is an absolute must for you, look elsewhere in the area. The same house in Pierce County will cost you thousands less than the one in King Co. Ask around with people you know for a good appraiser who will look after your interest, absolutely essential on a previously owned home.
When it comes time to finalize the mortgage take a look at these figures: (I just pulled a figure from the air, but you'll get the idea)
You borrow $100K @ 8% on a 30 year loan with a standard monthly payment of say $1100, you'll end up paying back a total of $240,000 with the interest.
BUT if you take that same $1100, cut that in half and make a $550 payment every two weeks, you'll save $37,000!!! in interest and have the loan paid off in 23 years. (You'll make an extra loan payment every year setting it up this way over the standard monthly payment.)
If you bump that loan repayment up to 20 years instead of 30 AND make the bi-weekly payment, you shave another huge chunk of interest off the total and you really won't have too big of an increase in your payment amounts.
Oh, and be wary of points. Mortgage companies love to give you an attractive rate and stick it to you on points.
Good luck and happy house hunting