There's a way to keep those greens fresh! I ran across a great tip from Alton Brown (food genius extraordinaire) that really works.
- Rinse your greens
- Soak them in cold water for 20 minutes:

- After soaking, drain in a colander
- After draining, spin greens in a salad spinner. If you don't have one (like me), you can lay out the greens on a clean towel, and dab dry with another clean towel.
- Roll up the greens in a long paper towel. This wicks away moisture but still keeps them slightly moist. I've also used a thin clean kitchen towel - it works just as well:

- Store in a Ziploc plastic bag. When you've almost entirely sealed the bag, insert a straw, suck in to remove the air, then seal completely. Yes - low-rent vacuum sealing your greens.
Now you have clean fresh greens handy for daily salads. Unroll the paper towel and take out the amount you need.
Alton Brown says the best greens to use are bulk mixed greens (the "serve yourself" kind you grab with tongs in grocery stores/co-ops). I've also found this method works with spinach & arugula. Yea!