A lot of fresh herbs can find a happy home in a glass full of water for a couple of weeks after they're harvested. All you need to do is fill the bottom of a glass with water and add the herbs stem first. Be sure that when you cut them, you leave some of the stem so it can take up water from the glass. Cilantro needs to be stored in the fridge for maximum freshness, but basil and parsley can sit on the counter at room temperature. Just be sure to change the water every couple of days, and wait to rinse the herbs until you use them.