your upkeep will be your downfall.— Unknown

Here are three practical (i.e., boring) ways to increase your net worth.
- Save More (Spend Less)
- Earn More
- Invest Better
The best technique is to "pay yourself first". Have a portion of your pay (e.g., 10%) deposited into a savings vehicle from which withdrawals are more difficult. You're less likely to spend money you don't see. Similarly, you can save a salary increase (or a portion of it) instead of spending it.
For those who don't payoff their credit card balances each month, an idea to pay for everything with cash. You keep one credit card for emergencies and cut up the rest. Put this credit card in a metal can, add water and freeze. Why? If you're tempted to make a purchase, you'll have to wait until your card thaws. By then, the urge to spend may be over. Why the metal can? So you can't use your microwave oven to reduce the wait time.
Earn More
You can increase your income by learning more and applying what you learn. I listen while driving in my 'university on wheels'. Traffic jams are no longer annoyances. They're an opportunity to listen longer ;)
Learning is also a strategy for remaining employable in the uncertain days ahead. Learning doesn't have to be in a classroom setting. You can learn plenty online for free using your favourite search engine. Blogs are an excellent --- and interactive --- tool.
Invest Better
Investing is a contentious topic. Who doesn't have an opinion or two? Relying on the advice of others over the years, I've lost money in shares, mutual funds, warrants, etc. Our current focus is paying off our mortgage while getting better educated about investing.
Interconnections
These ideas are related. Saving more and learning more help in investing better. Learning more is a form of investment. You can can the increase in your earnings from the increase in your learning.
Do you have other practical tips?