1.Greet people with a smile. Greet people with a pleasant smile. Smile whenever you see someone. The smile must be pleasant, warm and friendly.
2.Speak Pleasantly. Talk to people in a nice way, as if they are really good friends of yours.
3.Train yourself in public speaking. Take a course in public speaking and learn to express yourself the perfect way. This skill is highly essential and attracts favorable attention.
4.Have a good sense of humor. Get a couple of good joke books, read them and share them with people and this will certainly get them to smile.
An outgoing and friendly disposition would help you maintain a near-perfect relationship with people.