Backpacking mistakes ...and what to do instead

We took an overnight backpacking trip for the first time in a few years. We made a bunch of mistakes, but we got a few things right, too. Here's what I learned. What did you learn your first time out?
​
1. Don't take equipment you haven't tested
2. Don't be super cheap
3. Don't bring too much food
4. Do download specific local maps and apps
5. Do plan a lot but be ready to change the plan
6. Do make sure your maps are downloaded
7. Do share things so you don't have to carry so much
8. Don't drive away without checking everyone's pack for borrowed gear
9.Do ask questions
10. Do enjoy it all!