+1 to what K of K writes. I haven't used a tensionmeter, but one of the mistakes I made when first building wheels was to over tension them in fear of a loosely tensioned rim. As a result, I had no wiggle room to do any significant truing (and taco-ed a few in the process). So go slowly, work on vertical truing first, then lateral, back to vertical, etc. By doing that, I have found that I don't have to worry about final tension, and that my wheels stay true after lots of riding.

Neal