Twitter is both useful to some and then not so useful to many, however the beauty of the service is that there are so many tools & services built around it, that makes the service much more better to use.

Did you know that you could also use twitter as a reminder service? Well if not here are 10 handy reminder tools and services that can turn twitter into GTD service for you.

Also Read: 11 Ways to Send Emails in the Future

Remember The Milk

The big daddy of reminder services, RTM also has an option for users to set reminders using twitter. If you have a RTM account, all you need to do is follow @rtm on twitter and send your tasks as direct message to it.

And yes, you can also choose to receive reminders or task alerts directly to twitter.

Remindr

Earlier mentioned service Remindr is another interesting service that allows you to set reminders to be sent to twitter or email without registering or signing up, just head to the website, create a new reminder and follow @remindr_bot to get a nudge when the task is scheduled.

Remind me About

Remind me about is a simple twitter robot that allows you to send to do lists as direct messages, just follow @remind_me_about and let it follow you back.

Once it does you can send out messages as GF’s bday tomorrow or GF’s bday on 01/01/2009 (dd/mm/yyyy format) and it will send you back a reminder whenever the task is due.

The developer of the service is planning to make the code open source, so you will be able to run reminder services on your own server.

Other Useful Twitter Reminder Services

Sendible – Sendible is a full fledged reminder service with options that allow you to receive alerts in your twitter account.

Task.fm – The handy productivity service allows you to created reminders and receive alerts for them in your twitter account.

Plook – Pretty simple to use, just create a reminder and forget about it, you will receive a reminder when the task is up, no need to signup or register.

Twalert – Another handy twitter alert service that allows you to create a alert by using the web interface or by direct messaging @twalert.

Tweety PA – Tweety PA is a remidner service for twitter. You can book a tweet for anytime in the future, and have a direct message sent to you at that time. Depending on your settings this should also send you an email with your message of choice.

Twinders – Twinders is a free service that allows you to schedule reminders, memos, or notifications sent to your Twitter account on the date and time you choose.

Timer – A twitter robot that you can use as a reminder service, just send a direct message and you will receive a alert when the time is up.

Do you use any other service? Do let us know about them.

If you have missed some of our earlier posts about twitter, you can read them by following the links below.

• 5 Ways to Track your Brand on Twitter
• 5 Ways To Backup Your Twitter Account
• 7 Ways To Schedule Future Tweets In Twitter
• Get Real-Time Twitter Updates In Google Search
• 5 Tools To Measure Your Popularity On Twitter