Start helping those around you. Care about people. Guide them if you know a better way. The more you help others, the more they will want to help you. Love and kindness begets love and kindness. And so on and so forth.
This one seems like it should already be known, but I realize that's not the case. I do know that kindness can be something as simple as a smile at someone in the store to helping change a tire. There will be times when you feel like you can't help another person because you don't know how, but if you can just say a kind word, that might be all that's needed that time.
I disagree with the part that states "the more they will want to help you". I honestly don't believe that we should be kind to people so that it's returned, but more so that it's passed on. We shouldn't do things in the hopes that it will be returned to us... it just doesn't work that way. Just as an act of anger can spread, so can an act of kindness.
I'm keeping this one brief, but please keep in mind: it only takes a second to smile at someone.