Pay utmost importance to your Income-Spending Ratio. Even if your income increases a little, don't put everything into spending. You must use your finances judiciously.
Your spending limit should never exceed your income limit. This will only lead to debts and credits which in long term will only damage your financial means.
Invest as much as you can from your income so that you can used it for the rainy day, even if you think it is very little
Not saving enough money means that you are left without a back-up or cushion in times of emergency. Like they say, money saved is money earned.
Setting your priorities is a must for financial prudence. Mindless shopping will only mean that you stockpile things you don't require.
Not paying your debt on time will put you in a major loop. While you will always have to catch up with your pending debt, the newer dues will always get piled up.
Some sort of indulgence is good, but spending on mindless or wrong items is a futile exercise. You must prioritise if you need that bean bag or need your existing couch is good enough.
Keeping a record of your finances and expenses will make you grounded on the fiscal path. If you have no idea about your spending, you can never get to know even if you have been defrauded.
Most of us love spending on the thing we want, but don't forget that credit card comes with heavy interest rate. If you forget to pay on time, you will end up paying a high price.
Unless you have a well planned budget --no matter what your income is --you will always struggle on your spending front