1. Spending your money on unnecessary items immediately the money arrives. Trying to prove a point to people by living a standard that is above your pay grade.
2. Live on one source of income. Everyday of our life our responsibilities and challenges keeps piling up accumulating without consideration to our financial capability. The economy and cost of living continue getting worsen. So in order not to be able to beat this piling settle comfortably on a single source of income flow.
3. Become an extremely cheerful giver/lender to friends and family. A wisdom quote I read somewhere said, "if you want to lose your friends and family lend them money". Keeping doing this and you going to be successfully poor.
4.Learn how not to mind your own business, making every events around you your concern even when it doesn't affect you. It's a nice way to make cool enemies. Etc.
I trust you all get the sarcasm as conveyed.
The sad reality of life is that not everyone will be rich though even when richness is subjective to people. No matter how you guide and write books about ladder to success, some people will do what is going to make them happy rather than running after richness not to talk of being wealthy because having a wealth is totally different from being rich and being rich is different from average life and that is also different from been poor.
Your number 2 is also subjective; we have people who rely on a single source of income and make a lot of money, but their job takes up almost all of their time, so they don't have much time to pursue other sources of income. People who work in oil companies, particularly the top guys, devote their entire lives to it and it is their sole source of income, yet they make nearly all of the money anybody could possibly imagine since they are paid so highly.