Store notes about anything with productivity webapp UberNote. Keep a journal, manage to-do lists, store recipes, or sort your contacts within a handy rich-text editor that can be accessed from within any web browser. Easily add tags to your notes to easily find an item when you need it, and the search feature also works quite well. Notes are private, though the service aims to offer collaboration tools in the future.
UberNote is free to use, requires an email address to set up an account.