Business is tough, sometimes brutal. The best way to make a name for yourself is to think long term. Sure, you can make some money short term using any techniques that you want. However, if you truly strive to provide value to all of your clients, then longevity with them will follow. And trust me, there is no better business investment than this.
Building relationships is a fundamental principle of business. Business itself is as much of a social endeavor as anything else. This is primarily due to the nature of the subject; it involves interactions among individuals. How you conduct yourself will play a large part in your success. Treating people with respect and courtesy will be invaluable to you. People will remember the individual who is always calm, collected and courteous no matter what the situation.
Finally, make sure to understand that a lot of business can be personal, but only if you make it so. How you chose to conduct your business will play a major role in this. Making sure that business is not personal is something that you should strive for from the beginning. This way, it will be a lot easier to make criticisms and handle tough situations without stepping on peoples toes or getting on their bad side.