Tim,
Great unit you got there bud !
The way I used mine was to get on google earth, find the funnels, inside corners, etc, etc first. Write down the coordinates on a small notepad then hit the woods. I would plan out a route to hit 6-8 of those spots entering in the coordinates one a time as I went to each spot. Once there, if I needed to fine tune the exact tree I would hunt I would write down those coordinates or go ahead and mark and name it in the unti right there.
By doing it this way from the couch first I saved a ton of time and effort. I also found that what I could see from google earth that my gut feelings were right most of the time once I actually got to that spot on the ground. The sign would be right where it should be. Love the measuring tool on google earth ! I know how far a walk it is from access to the spot before I even get there. With the birds eye view of Google you can also find back doors and short cuts to your spots and know how far you are from other properties and hunting pressure. Technology can be so cool !