Using and Storing Culinary Herbs: Basil, lemon balm, pineapple mint, nasturtium, parsley, and lemon thyme can flavor your food in many ways during the growing season and for months to come. http://www.finegardening.com/plants/using-storing-culinary-herbs.aspx
Save the end from your lettuce and put into a little water (about a half inch). Change out the water every day. The lettuce will grow back incredibly quick too. The one on the left i cut today. The middle one yesterday and the one on the right, the day before. You can see how much it grows in just two days!! But don't feel limited to romaine. This technique can also be used with green onions and celery — from Addicted to Networking.