I've been meaning to post about my experience flying overseas alone on a 24+ hour flight with two kids (then 18 months and almost 4.5-years-old) and a dog on board, but time just got away from me and my life has been pretty wild and crazy since our move to Asia...even 8 months later!
Anyway, I randomly saw this blog just now about travelling with kids and this mom (and also the CEO of a company) has great recommendations. I thought I would share b/c I've seen a few moms asking about recommendations here and there. There are a lot of things that she did that I also did, maybe except for packing light. We were moving overseas so I had to carry our dog in a carrier and lug around a roller board with important documents, a laptop, etc. in addition to the two lightweight LeSportsac bags that I used to pack the kids stuff. Normally, I would only bring those two bags.
Hope this helps your travels with your kid(s)!