Sell does not just mean put up a sign and say you are selling your services; neither does it mean put an advertisement in the paper, a magazine, on the radio, on T.V. or in the air. Sell means do all those things if you think it is worthwhile doing. More to the point, sell means flog everything as if possessed until you are flogging a dead horse. Never let up and never let go, until you get a definite and resounding, "No!"
Add some more, means, once you have made one sale, go and sell some more product or services to the same person. Once you have established a customer, why only sell him one thing. Get your customer to like you and become your regular customer. Keep adding on more merchandise to sell to your repeat customers, and when doing so, up-size. Turn your $1.00 sale into $100 sale and your $100 sale into a $1,000 sale.