Giving comes in many forms; perhaps someone says they will get the tab at dinner, and you take care of it. Perhaps someone owes you a few bucks and you let it go. Perhaps a WW2 veteran goes to the counter to pay his pharmacy bill and you pay for it. Perhaps you decide to pay the toll for the guy behind you on the bridge. All of these show good will. You don't want anything in return. You just do it, even if you really can't afford to. Maybe that action will catch on, and more people will do it. Lead by example on this. I hope there are people out there who still do these sorts of things.
If you must ask for things because you want them, you should return the favor some how. It is not an "art" to beg for items you want, it is a scurrilous act just meant to fulfill your greedy dreams.
We all need to give more.