What can you do for eternity? You definitely cannot do anything that is big or great because that requires effort and effort tires you. So, doing something great is a temporary state. If you can think of one thing that is far beneath your capacity and agree to do it for eternity, that becomes puja.
The willingness to consciously do trivial things for eternity unites you with eternity. This is an antidote to ego. Ego is always ambitious and strives to do the toughest job, like climbing Mount Everest. Simple acts like watching a butterfly, watering the garden, observing the sky can bring deep relaxation, and relaxation connects you with your source. This does not mean that you should do trivial things all your life, but consciously agreeing to do trivial acts for eternity opens a new dimension and brings immense peace and restfulness.
To find rest in activity, choose an activity that is far below your capacity and agree to do it for eternity. Doing a job far below your capacity and being satisfied, will then make it possible to do a job much beyond your capacity.
Know that all actions are born out of infinity and that which is born out of infinity can take you to infinity.