for How to seal the deal instead of staying on the hook for monthly fees: three new guides to online dating, five tactical tips for all womankind. At 30, after a breakup that involved spotting her boyfriend draped around ­another woman, digital strategist Amy Webb ­decided to try meeting men online. And she did: On JDate, Match.com, and ­eHarmony, she met guys who were six inches shorter or 30 pounds heavier than advertised; who picked expensive restaurants and passed the check to her; and who told her, mid drink, that they were married.