Walking, driving, and busing, in that order. If there was a bike share program in place, I would use it, but probably more for recreation than anything.
I guess I am a little late to reply, but I would be very interested in a Bike Share program. Flex Scooters sound great too... Giving up my "ride" is unfortunatly not an option, as I work in sales and need to be able to dart around the Sound quickly and often times at the last minute. Luckily my commute is about 4 minutes (from Eastlake to KING 5).
I do see these option working into my evenings and weekends though, my only concern is still safety in the area at night.