My number one tip is always to play tight. From my experience, most new players play about 80% of the hands they are dealt in Texas Hold 'em. In fact, the reverse should be the case: they should only play about 20% of them!

My two daughters are now engaged in a scribbling rivalry.

When you're moaning, all you are doing is focusing on things that were not in your control, at least you are not exploring whether they were in your control, which is bad. You're just focusing on the one piece of bad variance that happened. There's nothing productive that comes from it.