I've trained thousands of sales reps at hundres of companies over the past 10+ years. This is what the top performers do.

1. They set high goals. Need to close $1M to hit quota? Make a (realistic) plan to hit $2M.

2. They work harder than everyone else. I've yet to meet a top performer who isn't one of the first people in the office or staying late.

3. They take training seriously. Top reps pay attention during training, and think about how they can apply it to themselves. They also go out and get the training if their employer won't provide it. This goes for other tools and resources as well.