Well, some good points on your post Bruno... I have to agree with all your hints.
Sure read is one of the best solution ! How is it possible to try something in a bizness you don't know ? And more than that, it's a general life lesson. you need to learn again and again to continue growing.
Thinking like the surfer is of course the way to go. But remember that it's difficult to have the same reaction. Each surfer is different and our internet knowledge make us less naive. Maybe a good solution is to ask advices, comments from your entourage, or ask them to test for you.
don't think to be underpaid ( if you're your own boss ) is a bad thing. I have to admit that investments are a difficult way of thinking. I prefer spend money to make my biz growing, buying content, adding good scripts or paying someone to gain time etc etc than buying a new cellphone or a brend new tv if its not needed. Don't forget, give money to your investments and your investments will give you the money back with interests.
Of course, failures in the biz are always present. You have to react with intelligence and as you said "Its OK to make mistakes. Making the same mistake twice is plain stupid though."
I think mistakes and failures can help to go ahead and to grow.
And for your last point: WORK IS THE ONLY AND BEST SOLUTION
1time again, Good post Bruno !