Premanand Maharaj Ji
How do I stop lying?
Speak less, take a niyam, chant the Name
Speak as little as possible, since a person who talks a lot will keep lying. Take a niyam (a fixed rule), save your energy and do naam jap, chanting Bhagwan's name.
Learn to speak as little as possible; then you will be able to leave lying. One who talks a lot will end up lying. Save your energy and do naam jap.