If This Then That is a simple to use tool to keep your social networks, to-do lists, RSS feeds, imaging sites and all your other webapps on the same page.
The core of If This Then That works off of different channels you can use to create your own recipes for sharing by using the basic instruction "if this, then that". For instance, you can set it so that if you send a text message with a particular hashtag to a specified number, then it will automatically create a note in Evernote. You can also set it to automatically pull your photos off Instagram and save them to Dropbox, send you a text message when you have a Google Calender event, or even send you an email if it's supposed to rain tomorrow. Provided you're using one of the 35 different services and webapps currently supported, you can cross-link and integrate them in almost anyway you see fit.
You can create your own tasks, or use one of the over 500 different ones users have already created and shared. If This Then That is still in beta, but it's free to sign up.