And I re-sized my brass before annealing.  

Usually I anneal and THEN resize, but my main question is will this have any effect on neck tension, or do I need to resize again?

This is for a .308 win precision rifle btw.


On another note, I'm starting to notice that I'm beginning to lose track of how many times certain brass has been fired.  How do you guys track your brass?

You may get a case separation from the hardened brass being softened by the annealing.
I bought some supposedly once fired brass, reloaded it without annealing, and have had several case separations with that brass.
It was recently fired Federal which probably explains why I had that problem.
I keep brass separate for the rifles I shoot with a written record i.e. 100 round case with reloading label.

I would measure it,
I doubt you will see any noticeable difference. the annealing helps by relieving the work hardening in the brass neck from being shot and stretched, resized, and pushed back in place.