Ifttt is a tool is based on a simple structure:
when something happens (THIS) then make something else (THAT).
The THIS part is a trigger, the THAT part is an action. When you link a trigger with an action, you have a task!
You can use one of these services of yours:
For instance, you can create tasks like these ones.
When you’re tagged in a Facebook pic, send the pic to your Dropbox.
When I mark a tweet as “favourite”, save it on Evernote.
When January 1 comes, tweet “Happy new year!”.
Wether it will rain tomorrow, notify me on GTalk.
When I check in on Foursquare, add the place and time to my GCalendar.
Useful, isn’t it?