Experienced Backjudges?

[movingthechains]

I noticed some real helpful "experienced" people on this forum in the past weeks. Just wondering if anyone out there has any advice for a new BJ, allthough I recently got assigned some varsity games at BJ prior to the season my preparation was 4 and 5 man HL and LJ, and in the past I worked only the flank positions in High school games. We use 5 man mechanics, I got some work at BJ in a scrimmage, and I understand the basics such as pre-snap routine, keys on specific formations, positioning depth, and goal line mechanics.

Im sure a lot of you will have suggestions so please let me know if there are any "tricks of the trade"