1. NOT HAVING AN EMERGENCY FUND
2. NOT INVESTING
This really varies for some people because for others, their salary is just enough for their needs and there is no spare money for an emergency fund or investment. I myself am having a hard time doing this, but with proper budgeting and cutting some expenses, I will try to do it this year because last year I had a hard time doing it, so I do hope I can have an emergency fund because it is very difficult to have debt these days due to high interest.
You've made a pretty significant point here: when folks are just trying to make ends meet, it can be very difficult for them to invest money or save for an emergency fund. Even so, it's imperative that you make the effort, even if it's only a small amount at a time, despite how difficult it may be. Budgeting and cost-cutting are excellent ideas, in my opinion, and they can assist people in finding even a tiny sum of money to invest or put toward an emergency fund.