Do it... every moment.

Get used to this: serve God with all your might, ask Him for grace, give Him your heart. Do this more often, even during your work throughout the day. Do this whenever you can, every moment. Do not cling too anxiously to prescribed forms or exercises. Perform everything in faith in God, out of love for Him and in full humility before Him.

(St. Lawrence of the Resurrection, correspondence, letter no. 5)