Smallest prayers will do.
There may be no need of elaborate big prayers and rituals that may not be environment friendly.
No need to recite or spend hours for mantras and tantra, or prayers, if you just send out a good wish for all and sundry.You may follow more than one religion, as it accommodates all mankind and living beings.Just following one religion should not mean that you look down on other religions and their people, because if you do this, you are no more a religious person.
Do not forget charity and service to humanity, but let’s not sing or harp about what we may be doing for anybody.Last but not the least, do not forget to do some silent nature meditations regularly.