But generally speaking to save and improve one's net worth one should do two things: (1) increase income (2) decrease expenses.
We all waste money on something we don't have to. Some people have bad habits like smoking, drinking alcohol, etc. that are harmful to their health and giving that up would not only improve their health but also would leave some extra bucks in their pockets. That is the decreasing expenses part.
The other thing is obvious, people can take additional jobs to make some extra cash.
In the end, saving is only part of the equation. People need to invest their fiat into something that is considered store of value so that they can maybe even make profit. Something like gold or bitcoin.
Working harder for increase of income.
Learning more about investment and having solid strategy of making savings and use part of it for investment capital.
Choosing a good or some good investment assets like Bitcoin and Gold. In my opinion, and with ROI data of Bitcoin and Gold, the proportion of investment capital must be bigger for Bitcoin as it has better ROI than gold.
The ROIs of Bitcoin and Gold are available with the website that has charts and tables for comparisons.
Case Bitcoin (useful)