Les Puces de Clignancourt offers miles of flea market finds if you have the time. If you'd like to be more focused in your search here are a few possibilities:
Find retro handbags and trunks by Hermes, Vuitton and Goyard at Le Monde du Voyage. Marché Serpette Stand 15, Allée 3 108-110 Rue des Rosiers
Vintage dresses by Saint Laurent, Dior and others are in a lovely collection at Patricia Attwood. Marche Serpette, Allee2, Stand 7, 110 Rue de Rosiers
The carefully curated rare antique jewelry at S. Corvez & Tierry B includes fine gems and unusual costume pieces. Stand 80-81 Allee 1 85 Rue des Rosiers
Pastries and Sweets
Sebastien Gaudard in the Ninth serves up delectable and classic lemon tart.
Gateaux Thoumieux - standouts include a flaky kouign-amann - a crispy butter cake native to Brittany. In the heart of the 7th arrondissement near the Eiffel Tower.
Chocolat Chapon - where master chocolatier Patrice Chapon makes chocolate bars and truffles from beans he selects. Four locations - http://chocolat-chapon.com/site.html
Classic favorites well cooked are hard to find, but these restaurants still take the time to do it right. None are inexpensive, all are worth the trip.
For Boeuf Bourguignonne, the rich beef stew of your dreams, try Josephine Chez Dumonet in Montparnasse at 117 Rue du Cherche-Midi.
Upscale Le Coq Rico in Montmartre, offers the last word on spit-roasted chickens, with special breeds from Landes, Challans, Bresse and other departments of France. 98 Rue Lepic, 75018 Paris
Musee Carnavalet is dedicated to the history of Paris, with models of the city at various points in history re-creations of rooms from various periods. In the 3rd Arrondissement.
Nissim De Camondo was the home of Moise Camondo and features the family collection of Sevres porcelain and Savonnerie carpets.
After a four-year renovation, the neo-Renaissance Palais Galliera reopened last year, to display its archive of roughly 100,000 pieces of French clothing and accessories dating to the 18th Century.
For more insider tips, see http://www.travelandleisure.com/travel-guide/paris