Got flabby triceps that flap when you wave? Longing for a bigger bulge when you flex your biceps? In-shape arms can increase your overall strength as well as your vanity, says personal trainer Sal Fischera, an American Council on Exercise spokesperson in New York City: "Not only do strong arms look great, but they make everyday activities easier." Follow Fischera's tried-and-true arm exercises two to four times a week, and you won't find an inch to pinch. What you want: BUFF BICEPS How to get 'em: BICEPS CURL WITH A TWIST Stand with your feet shoulder-width apart and your…