The moment the alarm goes off is the first test; it sets the tone for the rest of the day. The test is not a complex one: when the alarm goes off, do you get up out of bed, or do you lie there in comfort and fall back to sleep? If you have the discipline to get out of bed, you win - you pass the test.
That nice, soft pillow and the warm blanket, and it's all comfortable, and no one wants to leave that comfort - but if you can wake up early in the morning, get a head start on everyone else that's still sleeping, get productive time doing things that you need to do - that's a huge piece to moving your life forward.