Worship God or burn in Hell. Well rather face judgement from God after you die, which could lead to burning in Hell.
Worship God because he made us. Many are ungrateful, but God must have had a reason for making us the way we are.
Worship God because he wants you to have the best in this life and the next. Well some of us, he must want to suffer? He only tests the strong, right?
But most importantly, worship God because he sent his son Jesus to die for our sins so that they can be forgiven. God loves the sinner, but hates the sin. The sin keeps us away from God and gets us into trouble. When we disobey God, we sin. God sent us the Ten Commandments, the Mosaic Laws, and other things to follow like the words of Jesus.