It is impossible for me not to layer tags. I just do not like the look of a plain tag. I almost always punch out two tags in a solid coordinating colour and off set them behind the main tag. This is how I border my tag punches.
I also really like depth in a card. With punch art it is very important that you add depth or it just looks flat and plain. To do this simply use a sponge and ink pad and sponge ink in the same or similar colour of the cardstock along the edges. As you can see on the Castle door I have done this and made stand out more!
Don't forget to check out the retiring list this month and look for the new 2012-2013 Catalogue coming out on June 1.