April 28, 2005 Ears Plugged? Keep Eyes Open, Subway's IPod Users Are Told By SEWELL CHAN llison Emmett, 26, a lawyer who lives in the West Village, has rules for riding the subway while listening to her iPod. "You keep it in your bag," she said. "You keep your bag in front of you. You keep your hand on it."Sarit Sela, 27, an administrator at Goldman Sachs who lives in Astoria, Queens, said she kept her iPod in a handbag, secured by a clip. "When I'm on the subway, I try not to change the music," she said.Both women...