Freelance writers, here’s your morning stimulus plan. Dunkin’ Donuts is giving away free one-ounce samples of its regular ground coffee and the new Dunkin’ Dark blend. There’s nothing like free coffee, but jump on this one fast since the last time we spotted this, supplies vanished quicky. At the Dunkin’ Donuts page you’ll find a form to fill out–tell them where to send your free coffee and you’re all set. Now if they only gave away free donuts to accompany the brew…