Be the Turtle
There's a reason the age-old story of the hare and the tortoise is still around. It's true. Hares may be quick off the starting block, but they usually crash and burn before reaching the finish line. Tortoises, on the other hand, pace themselves for the long haul and reach their goal.
The difference between them, however, is not speed. It's consistency. Consistency is probably the single most important factor to success in any endeavor. It's showing up for yourself time after time after time. Whether your goal is to lose weight, increase flexibility, improve strength, or learn to play the piano, showing up is half the battle, and it's the only way to get anywhere in the long run.
So focus on consistency first, and worry about ramping it up later—the momentum will build naturally. Before you know it, you'll be cruising along with ease and you'll sail right by that hare like he's standing still, which shouldn't be too hard to do when he's passed out under a bush.