The practice of “casting lots” is mentioned 70 times in the Old Testament and 7 times in the New Testament. It isn’t known what this entailed, whether it was a form of dice or coins or using sticks of various lengths.

The passage you mentioned in Acts 1 is interesting, because it says that the apostles followed this procedure:

1) they proposed two men to replace Judas
2) they prayed and asked for God to reveal His will
3) they cast lots

From this, one thing we know for sure is that it’s important to pray and ask God for wisdom when we seek to know His will.