Charmion, wash the cilantro, pull the leaves off of the stems, then fill a heavy-duty ziplock bag with the leaves. Zip it almost completely closed and then press down on the bag to remove as much air as possible and finish the zip close. Freeze that flat green bag, and any time you need some, go through the rapid operation of opening the bag and breaking off a chunk of the leaves. Put the bag in the freezer as soon as possible and before the chunk has thawed, give it a rough crumble with your fingers and palms into whatever you're cooking. It's as close to fresh as you'll get if you don't want to buy fresh and toss out 90% of it each time. The entire operation has to take about 20 seconds or the bag and the broken piece begin to rapidly soften.