To achieve your aims, keep them realistic—and make a detailed road map for reaching them. I’ve done it, you’ve done it, we’ve all done it. With the best of intentions, we set big goals for our future: get a work promotion, lose 20 pounds, run a marathon. And too often, we give up a few months later, realizing we bit off more than we could chew. Why? We get enamored with the idea but the execution? Not so much. Goals can seem straightforward, but without a specific plan or realistic milestones, they quickly fizzle out.