When you set the due date, the menu of options -- like everything in reQall -- is in plain, casual English. Options are expressed like these examples: "Tomorrow morning," "in a couple of days" and "in a month." The due date (and even time, if you wish), determines which tab it goes under. For example, if you choose "in a month," it goes under the "Later" tab. As the due date gets closer, reQall automatically moves that item from "Later" to "Soon" to "Today" and, if you don't complete it on time, "Overdue."

There is a long list of powerful, easy-to-use features in reQall that I'm not telling you about for the sake of brevity. In a nutshell, it's awesome, powerful, flexible and -- best of all from a GTD perspective -- gives you mental clarity about your unfinished tasks.

The ability to phone in your to-do items, then manage them online from any PC is great. But even greater are reQall's incredibly appealing iPhone and BlackBerry applications, which let you do almost everything you can do on the Web site, but from your smart phone.

Re:snooze

A free Web-based service called Re:snooze lets you set reminders, which will arrive in your e-mail in-box at whatever frequency you set. Best of all, the e-mail it sends offers four "buttons" that you can click on directly from the e-mail message. Those buttons offer to change the frequency of that message or delete the reminder, all with a single click.