i'm not sure if this entire falls under motivational, but there is a book of affirmations that i like called 28 Days to a More Magnetic Life by Sandra Ann Taylor.
it helps you shift your consciousness in a more positive direction, and i find it to be more motivating, and helps me find that sense of control that i struggle to always see. also, its brief and to the point. see if the they have it at your local library, and if you like it, buy it
i think it's $7 on amazon.