Most of these are common sense. As a tourist foreigner, you also aren't expected to know all the customs but it's appreciated when you try. The one about which direction to NOT point the chopsticks in was new to me. If you just watch what other people are doing, then try to do the same thing, you're probably on the right track.

Related to eating, one pro-tip I got from a local is that when you're ready to close your tab or get your check at a bar or restaurant, you can make a small X with your index fingers.

Really useful in a busy bar!