Joshua 9:14 So the men of Israel took some of their provisions, and did not ask for the counsel of the Lord.
Israel had specific direction from God to not make a covenant with the people of the land. When they were faced with a choice and were unsure if this was the situation He was talking about, they listened to other people and didn't talk to God.
When I come up against a choice that I am unsure about concerning God's commands or direction, I need to seek His counsel. I need to pray and listen, and read His word. I can research and talk to people as well, but I better listen to God above anything or anyone else.