Nudge a current asset or liability up or down and watch the sign of its adjustment flip.
Accounts receivable
Current asset
+$1,000
($1,000)
follows the same rule. An asset going up means cash went somewhere else instead — subtract it. A liability going up means an obligation grew instead of cash going out — add it.
The reverse is just as automatic: an asset going down releases cash, and a liability going down required cash to pay it off.