When you finish lacing, make sure all the spokes are seated properly-I like to tap all the elbows with a rubber mallet. Tensioning spokes will pull out the elbow bend a bit. It doesn't seem like much, but if you don't stress the wheel enough while building it, you will lose a ton of tension on you first ride. When it comes time to tension, you want to go every fourth spoke, so you will end up going around the wheel four times. The slower you bring up the tension, the truer the wheel will stay as you are building it. The valve hole is a god ref. point. The idea behind this is that you don't want to tension one part of the wheel too soon. Not doing this will make rounding the wheel a pain. Also keep in mind that with any wheel, as you ride the flange holes will ovalize some. This means that your wheel will loose tension when it is new. I would recomend checking the true and tension after each ride for the first several rides. This will make a difference in how long the wheel lasts.