M8 Freeclips is the simplest of all multi-clipboard programs. Just have it running minimized and it captures everything you cut or copy from other programs.

It keeps the last 30 clips. When you want to paste one back, all you have to do is restore M8 and click on the clip you want. When you move the mouse over the clips, you can see them in the viewer. If the clip is text, you see several lines and if it is a graphic, you see a thumbnail.