There is this Google Chrome app called Write Space that behaves much like the Sticky Note on windows. There is always need to type and save stuff while blogging. It could be future post suggestions or things you need to do later, after blogging. Having these tools can save you time of leaving your computer to attend to certain things, lest you forget.
To use the Chrome App, just open a new tab and go to Apps. But you must have the Write Space installed. Find the link to the Store at the bottom right.