The Lord can be served by any ingredient, even the most common commodity — a flower, a leaf, a fruit or a little water, which are available in any part of the universe and without cost and thus the Lord is served universally by the universal entities.
Srimad Bhagavatam 2.9.36,
Giving wealth in service of the Lord, your profits will always increase. Thus you save yourself from repeated birth and death.
Those who perform severe austerities and penances, those who give away all their possessions out of charity, those who are very famous for their auspicious activity, those who are engaged in meditation and mental speculation and even those who are very expert in reciting the Vedic mantras are not able to obtain any auspicious result, although they are engaged in auspicious activities, if they do not dedicate their activities to the service of the Supreme Personality of Godhead. — Sri Caitanya Caritamrita, Madhya Lila, 22.20.
A pure devotee has no demand from the Lord. His only concern is to serve the Lord sincerely and seriously and he is not at all concerned about what will happen in the future. — Srimad Bhagavatam, 04.09.29.
As soon as we get to know the Absolute Truth, we should become fixed in it. Instead of wasting a single moment of time left, we should be engaged in serving Sri Hari.
Material sense gratification, sinful activity kills the propensity to serve Krishna.