These sites are totally free to join, but you do receive an email from them every day with the new deals so if you don't want those to come to your main email inbox I highly recommend setting up a free "Deals" email account; for example: SamsDeals(at) hotmail.com.
Redmond Groupon: Flying Saucer Pizza is offering $20 worth of their famous personal sized pizzas for only $9! You must use the Groupon in one visit but their pizzas range from anywhere between $5 - $10 each; I have personally eaten here before for lunch and it's delicious! Go HERE, sign up for an account and choose the Redmond deal to get in on this!
Living Social Seattle: $15 gets you $30 to spend on food and drink at Tacos Guaymas! Craving Mexican anyone! Dinner for 2 and a mararita for only $15, yes please! Sign up for Living Social HERE and get this deal!
Zulily: I just recently discovered Zulily; its a fun site that specializes in mostly retail items but occaisionally some awesome local deals in the Seattle area for moms and tots! It is invitation only so sign up HERE to get in on the deals! Time to start thinking about Christmas gifts! Frecklebox is offering a $30 gift certificate for only $15 on fun personalized kids items!