If you want to create a library of effect presets, you can create a separate document with a bunch of squares or circles or whatever and whenever you need something, just load up that file and copy/paste the attributes. I did that a while ago, when I first discovered Paste Attributes, and I keep adding to it so that it has become quite comprehensive. It is particularly good for saving plugin presets, as things like Xenofex always seem to default to something useless and I tend to always use the same settings.
Added by Sledger :This file of 'presets' can be added to your custom Design gallery folders.
see original thread here