I like to leave comments on people's weblogs and on forums (like this one). How do I keep track of all the weblogs comment threads and forum threads in which I'm waiting for a response?
Thought of an idea: bookmark the threads. You can use your browser's bookmark feature (have a @WaitingFor folder).
Advanced: For "location-independent bookmarking", you can use a web-based bookmarking service like del.icio.us, or the BlogThis button for your blog (be sure to include a keyword like "tag:waitingfor" so you can easily find them later).