This is a list I submitted to one of those email forwarding sites. What do you think of it?
1. No one knows everything. This should be obvious, but it is worth stating. Even the most wise and intelligent people always get something wrong.
2. Learn as much as possible. Try to learn something from everything you do and everyone you speak to. You may gain some important new knowledge, even if it was not intended.
3. Nothing is above criticism. You can never judge the value of anything (value is meant in a few ways), unless you see its faults.
Once you stop listening is when many problems of all manner start.
4. Wanting something to be true doesn't make it. This applies to many things such as religion, love, and ideas such as that good people always win in the end. It is better to change a bad reality for the better than to deny it.
5. Don't be afraid to stand for what is right, even if you are the only one standing. This is very important. If no one ever did this there would be little or no progress and we would live in a much worse world.
6. Ignorance causes more harm than malice. Very few people have genuinely bad intentions, but because of ignorance they will see the bad things they do as good.
7. Anger is useless. It is better to fix a problem rather than getting angry over it. A "problem" here could be anything.
8. Don't pretend to be more than you are. Humility would do the world a lot of good. This includes admitting you are wrong.
9. Life has no meaning and there is no such things as perfection. This is actually a good thing. Because of this you can create your own meanings of purpose and perfection.
10. Don't resist change. But always analyze it.