Can someone let me know the cheapest way to be successful at giving up sugar?

Hello my name is Stacy I really would love to be able to give up sugar I have a sweet tooth and I know that I eat sugary things because I've convinced myself that it helps with me being stressed or soothes my emotions. I have been drinking my coffee black for a while now. I also know that I have family that sabotage me and I also self sabotage myself. .