what kind of fish are you interested in fishing for?
for perch you can go into almost every weed bed and find some but you will have to find the deep edges for the big ones. jigs and worms work good for them. for bass you can work the main points on the lakes and all the bridges and boat docks. most lures work for them spinnerbaits, buzzbaits, crankbaits, drop-shots, grubs, lizards, senkos.
for depth during the summer big perch will be in 20'-30' of water. during the winter the perch can be in as much as 100' of water. bass will be all over depending on time of day and weather conditions. but mainly between 10' and 30'. largemouths will be in shallower then that most of the time.
there is also many good shore spots around the lake that can be very good for perch and bass. the seward park area is good. a couple of good parks are burbank (on mercer island)and coulon. the perch are starting to show at both of these parks.
hope this helps. let me know if you need to know about other fish.....