didn't know where to put this, taking pictures during build?

I think you put the question right where it needs to be.

So when to take pictures?? Well I think it's a matter of preference. If you notice some folks take picture at the same stage of every build or wherever they add detail. MOTM pics are required per the rules to show YOUR work, you know what I mean.

I think you just need to find a system for yourself. Think of when you want to post pics and maybe do it the same for every build. I think many of us have multiple builds going on at once and taking pics does get to be a handful. What helps me is when I upload them to PhotoBucket, I create a folder for each build so they're easier to track and refer back to. You can do the same if you keep the pics on your computer.

I think I'm rambling already. Hope this helps, but ask any other questions you may have.