All you need to do is to think before you spend. Consumption spending can contribute to your lifestyle (driving a new car is fun, even if it was bought on credit and has created a liability of three to five years of payments). Investment spending provides income and wealth.
Shades of Grey
There is, of course, some spending that is not clearly defined as consumption or investment. Buying your own home is considered by many to be an investment. It isn’t! The purchase usually is financed and the repayments are a liability. The upkeep of a house costs money. There are rates and taxes payable on it. You do not get any revenue from it. If you plan to sell it in a few years to make a profit on its increased value, then it may be an investment. However if you have to buy another house to live in are you really any better off?