A Little Help? (Not a Warning)

[thisbloodybone.livejournal.com]

I'm sorry if this is the wrong community for this, but it was the only one I could think of. If someone could direct me to where this question could get answered (if not here), I would really, really appreciate it. :)

But I digress. I've recently been trying to take on more commissions. I found there is suddenly a demand for my art, and it also helps when you can't seem to find a job. As for procedure, I've taken a lot of my inspiration from advice in this community. There's just one thing I'm a little foggy about.

Is it okay to work on one commission at a time, forcing those behind them to wait?

I took 2 full image commissions at AC, and have been trying to work on them at the same time to prevent people from waiting, but I find myself getting overwhelmed and stressed out. Is it okay to stop, focus on the first picture in line, finish it, then move on? I just didn't know if that seemed unfair to the rest of the people in line.

How do those of you who take commissions handle it?