If you are a lifehacker reader, you’ve probably already seen this, but it’s one of those most useful things I’ve found online in a very long time.

Essentially, you make a special bookmarklet that lets you resize any textbox with a single click. 

Here’s a typical textbox on a comments form. They are never big enough… what’s up with that?

Just click the icon, and resize the textbox:

You can get the bookmarklet here.