What are some of the bad habits that people have in managing their finances?

Being enticed into purchases by these wordings...

OFFER!!

DISCOUNT!!

FIRE SALES!!

TODAY ONLY!!/LIMITED TIME!!!

ADD ONLY $XX/$0.XX FOR XXX!!!

BEST VALUE!!!

NEVER-AGAIN SALES!!

YOU WILL NOT REGRET!!! (Actually you will lol)

Instead, hold your cash back and return a week later if you really need to buy.

(1) IF you need to, you'd buy regardless because you can't wait.

(2) IF you can wait, you can wait for the next sales.

(3) IF the next sales doesn't happen; (1) will happen. IF (1) doesn't happen, it means (2) can happen. Repeat the process and you'd notice you actually don't need it at all = save money (hooray!)

1. Spending to save.
2. Buying endowment plans / topping up srs / topping up cpf / any other similar forced savings when it would have done better in a multiplier bank account or when you are unsure if you will ever see that money when you really need it.

Thinking mobile plan is cheaper than sim only + buying phone elsewhere.

I know someone who travelled all the way from Jurong to Eunos to buy 50 Otaks for a BBQ gathering because the unit price was cheaper (not sure how much cheaper). Then have to throw many of the otak away because can't finish them at the end of BBQ.