I learned from my accounting 101 professor, "debits on the left, credits on the right."

Then later after learning about natural account balances, it all made sense. If an account has a debit balance, a debit increases the balance and a credit decreases it. An asset or expense account has a debit balance.

Credit balance is just the opposite. Liabilities, revenue, accounts. Credit is an increase, debit decrease. (I think equity too but I always have to look it up. Rarely work with equity accounts in my day to day)