must be done for satisfaction of Visnu / Krishna

So do anything. If Krsna is satisfied, that is yajna. That is yajna. And one should live for that purpose. Yajnarthe karmano 'nyatra loko 'yam. Work very hard, but yajnarthe. And if you work so hard like ass and cats and dog simply for satisfying your tongue or belly or the genital, a straight line, then you are going to hell. Yajnarthe karmanah anyatra karma-bandhanah. Then you are becoming bound up by the laws of nature. If you eat and sleep and act like dog, then become dog next life. And if you act like god, then you'll get god, very easy thing. So whatever you like, you can do. But the sastra gives you direction, yajnarthe. "Act, work, work hard for pleasing the Supreme Lord." Yajnarthe. Otherwise you will be bound up in the cycle of birth and death. Don't do it.    (More...)

Ramesvara: [reading] ...mukta-saṅgah samacara [Bg 3.9]: "Work done as a sacrifice for Visnu has to be performed. Otherwise, work binds one to this material world. Therefore, O son of Kunti, perform your prescribed duties for His satisfaction, and in that way you will always remain unattached and free from bondage." Should I read the purport? Purport: "Since one has to work even for the simple maintenance of the body, the prescribed duties for a particular social position and quality are so made that the purpose can be fulfilled. Yajna means Lord Visnu or sacrificial performances. All sacrificial performances also are meant for the satisfaction of Lord Visnu. The Vedas enjoin: yajno vai visnuh. In other words, the same purpose is served whether one performs prescribed yajnas or directly serves Lord Visnu. Krsna consciousness is therefore performance of yajna as it is prescribed in this verse. The varnasrama institution also aims at this for satisfying Lord Visnu. Varnasramacaravata purusena parah puman visnur aradhyate [Cc Madhya 8.58], from the Visnu Purana [3.8.9]. Therefore one has to work for the satisfaction of Visnu. Any other work done in this material world will be a cause of bondage, for both good and evil work have their reactions, and any reaction binds the performer. Therefore one has to work in Krsna consciousness to satisfy Krsna, or Visnu, and while performing such activities one is in a liberated stage. This is the great art of doing work, and in the beginning this process requires very expert guidance. One should therefore act very diligently under the expert guidance of a devotee of Lord Krsna, or under the direct instruction of Lord Krsna Himself, under whom Arjuna had the opportunity to work. Nothing should be performed for sense gratification, but everything should be done for the satisfaction of Krsna. This practice will not only save one from the reaction of work but will also gradually elevate one to transcendental loving service of the Lord, which alone can raise one to the kingdom of God." [break]    (More...)