Another totally painless money saving tip:
What do you do if you make a mistake tearing the tabs of a parking coupon?
Stop tearing any more tabs from the parking coupon but you don't have to throw it away.
You can actually bring the parking coupon back to HDB office for a refund.
Of course, it may not be so wise to bring a 50cents coupon there specially to get a refund but if there's a HDB office around where you work or stay, why not?
Did you know this?