Lead life in the world as a compulsory duty imposed on you, like you are serving sentence in prison for crimes from previous births. The superintendent assigns various duties — cooking, cleaning, chopping wood, etc. You must do work assigned to the best of your ability, without any expectation of reward. If you behave well, cause no trouble, and do assigned duties without demur, then your sentence may be ended sooner and you would be released with a good conduct certificate. This attitude will help you practice selfless action without expecting rewards (nishkama karma), which is very valuable to curb your senses. When Pandavas were affected by mental anxieties, Dharmaraja prayed to Krishna. Krishna spent time comforting them, and when He was departing, Krishna gave Dharmaraja one line, which he was to remember whenever he was affected by joy or grief. It was: “This will not last (Eppudu undadu).” That is one powerful method by which mental agitations can be calmed.