The Rebbe advises to memorize several chapters of Mishnayos, Tanya, and Tehillim and to use every free moment—on the way to work, from work, or during breaks—to recite them. He explains the special merit of learning and praying at such times and blesses for fulfillment of heartfelt wishes.
https://www.torahrecordings.com/rebbe/igroskodesh/009/010/2768