Sent to you by Chris Hunter via Google Reader:
Adding lemon to your water is a great way to give it some flavor, but a pitcher full of water and lemon slices needs to be emptied quickly or else the water will start to taste bitter. Try freezing lemon slices in ice using a cupcake pan for large, lemony ice cubes that will add flavor to your water or other drinks.
Using a cupcake baking sheet lets you get entire slices of lemon in your ice cubes, and freezes them large enough that they'll work in a glass of water or a pitcher of it, depending on what you make. Adding lemon to water was one of your most suggested tips to learn to love the taste of water, but this tip works just as well if you're making another drink where a little lemon can add some flavor (like a gin and tonic, perhaps?)
You can reach Alan Henry, the author of this post, at firstname.lastname@example.org, or better yet, follow him on Twitter or Google+.