Education
With the exception of those who deliberately choose to be wicked, the vast majority of people who grope in the darkness of ignorance and whose ignorance confuses them as to their duty, making evil appear as 'necessary in the circumstances', will definitely grow spiritually if more and more people take upon themselves the duty of educating their brethren (especially the younger generation) in the art of right conduct.
Love
It is when we are full of love in all our relationships that we really and truly love God, Who is Omnipresent.
Smile
You can promote the others' happiness by just a kindly smile and a loving look.
Nature
Nature is complex in her simplicity.
She loves those who try to understand her.
The Real Doer
This feverish activity, with its selfish motivation, keeps the individual so intensely occupied that he has neither the time nor the energy nor the motivation to examine the whole position and ask, "Am I the real doer of these actions?"