When cutting/pasting to some web apps or editors I find myself annoyed that the formatting from the source came along – font size in particular. The really annoying part is that everything I type after what I pasted is in the new font.
To get around this I paste to notepad and cut it from there. This way I only get the text and not the formatting.
To do this quick I use launchy to open notepad, but without launchy you can do it pretty quick with Windows Key + R, type notepad + return, then paste, select all, copy.