How to avoid debt. If you have no money, don't buy anything! Simple.
And if you have no money, but need things, creditors don't want to loan money to you. But if you have money, they run after you to get you to borrow it.
I try to borrow only for those things that I need and don't have enough money for (like a car). If I don't need it, I can wait to buy it without credit (like a 4-wheeler, which is nowhere on my list anyway).