Sticks and chips
Japanese sets include point sticks in standard values. Chinese groups often use chips or coins. Both make payments quick and visible.
Paper and apps
Many American and casual groups keep a written tally. Score-keeping apps are increasingly common, especially for riichi and MCR, and can calculate values automatically.
Settling promptly
Pay after each hand, rather than letting debts accumulate. That keeps the table relaxed and everyone aware of the standings.
Points without money
Many groups play for points only, recording results over weeks or seasons. It keeps all the tension of scoring without any financial stakes.