Holy Cow !! - Drag and drop attachments onto messages

I'm always looking for ways to save time. Suppose I want to attach some files to an email, and I already have a folder open containing those files.

I used to have to click "Attach a file," find the photos, click them, etc. Starting today, if I'm using Google Chrome or Mozilla Firefox 3.6, I can just drag and drop the files to attach them — easy as pie.

We'll enable this for other browsers as soon as they support this feature. For now, you can drag and drop attachments in Chrome and Firefox only.

Drag and drop attachments onto messages - Official Gmail Blog