If you'd like to know what the model of repentance is, you can look no further than Zaccheus.
Jesus has rocked his world. We don't know what was said around the dinner table that night, but it messed Zaccheus up to the core. Whether he sat there drooling olive oil into his beard or whether he held it together long enough to make it to the bathroom before he lurched, we don't know. In fact, we don't know much about the little guy with the Lord God.
But we do know it's result.
He gives away half his stuff.
He pays back with significant interest those whom He has defrauded - the amount x4.
Generosity and a sense of reconciliation. Seems like pretty good marks of repentance to me.