At the top right corner I added a link to a forward PE analysis. (I got tired of continuously calculating it, so I created a spread sheet on it.) I will use it for stocks I can assess via PE. For now, I am using it for AAPL and IBM.
I use this concept as one way to gauge a base as to where the stock should be trading from one quarter forward.
For example, AAPL and IBM, when they report next quarter, their trailing PEs should stay around current levels. With that assumption, when they report next quarters earnings, the stock price should be at specific levels.
(I put it up there as a quick link for me to use and reference.)