Here is a bike map for Snohomish County:
http://www.cityofmillcreek.com/DocumentCenter/View/48
I recommend that you go here:
Routes at Bikely.com and you can do a search for everett WA and a bunch of stuff will come up.
I like to drop into Snohomish from Mill Creek go up Lowell and head back via the Interurban trail.
If I have less time, I'll just do the Interurban trail from Mill Creek to Everett.