There's no specific way to be a giver than to be generous with whatever you have. Unfortunately, there is stereotype that has permeated the fabric of our society for far too long that giving is only through giving out money or any other material items. This is completely wrong because if this how it is with giving, that means it won't be everybody that would be able to give.
When it comes to giving, however, it should be something done from the bottom of one's heart. And it shouldn't be seen as a thing that must involve physical items, but then whole essence of human being. If it is knowledge or respect or love you think is what you can give, make sure you do it without expecting anything in return. Same goes with whatever it is you want to give to your fellow man. Give without expecting anything back!