Here is one I can think off; not exactly tipid tips but a way to save up money:
(1) At the end of the day, separate your gold coins ($2 & $1) and place them in a piggy bank.
As per experience kasi, my coins are usually the first to get spent - usually impulse buy such as soda, magazines, gums, etc are paid using coins. As oppose to say you have a bill, if you really don't need naman the commodity, you will just tend to defer the purchase.
This can grow substantially after a few months! đŸ™‚ Done this in Singapore previously with gold coins and 50cents!