What to offer in Puja ?

What is the proper offering to God?

It is said, Patram, Pushpam, Phalam, Toyam
(a leaf, flower, fruit and water).

What are these?

Your body is the leaf, your heart is the flower,
your mind is the fruit, and your tears of bliss are the water.

Instead of attaching undue importance to this ephemeral body, emphasize the atmic principle.

Also surrender the body unto God. How?
By acts of worship and other sacred deeds.