Don't put in a mahogany row with thick carpets and reserved parking places with the first brush of success. As a matter of fact, save the fancy stuff for your personal life. Ignore the competition. More people waste more time worrying about, spying on, copying and trying to undercut competition than almost anything else. Just go forward and do your best.
Elbow grease is a good substitute for paranoia.
Preserve your sense of humor. At all costs. I know it's hard to laugh when you lose a million dollars, but if you don't have a laugh or two each day, you might as well drive a cab.