As an imperfect creature, I commit mistakes, and I also try to avoid them. Here are a regular ones, I hope to not repeat them, but it seems it's hard to learn your lessons sometimes...
* First say thank you when people are trying to help you, ask you something, or suggest you something. People take from their limited time for you, don't neglect that.
* Say when you're new to something or lack knowledge. Show your weaknesses and stay humble. Sometimes it can really makes a world of difference and even bring you opportunities / gifts. E.g : some shops will give you some extra for your first visit, especially if your toddler is cute and with you :-)
* Don't propose solutions/help too early especially if not asked. Many people prefer also to learn and solve problems by themselves.
* Let it burn. Sometimes that's the best you can do. Don't try to extinct every fire. Focus your energy on the problems that really impact you. There are enough solutions and people for the other problems and you don't have time for them all.