Round Up Every Purchase and Save the Spare Change

Every time you spend money, round the price up to the next whole unit and send the difference straight into a savings account. Set it up once — many banking apps do this automatically — and the habit runs itself from then on.

The amounts feel too small to notice in your daily spending, and that is exactly why it works: you build savings as a side effect of living your life, instead of a separate chore you have to remember.