Google Picasa is an amazing software. It looks and works like Apple's Aperture.

Sice you are using Picasa, here are following things you shoukd really know.

1. Never Delete a Folder but Images.

If you are considering deleting a folder, beware. If that folder contains sub-folder(s) or any other files then they will also get deleted. This may appear to be pretty obvious but at times you will forget it and you may end up losing your important data.

So remember, Always delete an Image.