Scenario: You're at an engagement/graduation/garden party and you go to pour yourself a glass of Champagne, only to have the whole thing overflow in a cascade of bubbles and holy crap everyone is staring. Here's how to avoid the sparkling volcano.
Step 1: Pour only an inch of Champagne into your flute.
Step 2: Wait for the bubbles to subside.
Step 3: Fill your glass the rest of the way. See? No fizzing. (It's the same principle that keeps a beer from getting too foamy when you pour it against the side of a mug.)
Step 4: Cheers! You have officially done nothing to embarrass yourself...yet.