If fast food and instant noodles are not good for your health, one thing that will sure have a good effect on your freelance career is to be quick, be fast. Don't be just on time. Be early. Be an efficient freelancer. And I will guarantee you'll see a big difference in many aspects of your freelancing.
Your clients will be amazed and you'll most likely get another project from them
The wow experience will get you a bigger chance of referral
Your client will likely keep your service...