Caretake this moment. Immerse yourself in its particulars. Respond to this person, this challenge, this deed. Quit the evasions. Stop giving yourself needless trouble. It is time to really live; to fully inhabit the situation you happen to be in now. You are not some disinterested bystander. Participate. Exert yourself.

Recommended reading: Art of Living: The Classical Manual on Virtue, Happiness, and Effectiveness.