The source with explanations. [http://www.gilt.com/giltmanual/category/essentials/] I agree with most of these

Check indicates what I have so far

• A Seven-fold Tie
• ✔ A Go-to Karaoke Song
• ✔ At Least One Jacket with a Gratuitously Colorful Lining
• ✔ Luxurious Underclothes
• A Go-to Whiskey
• A 10'' Chef's Knife
• A Tailor Who Knows You By Name
• ✔ Working Knowledge of Knots
• A Serious Pair of Wingtips
• ✔ A Cast Iron Skillet
• A Wallet That's Worth More Than The Money In It
• Socks That Show You Are Not Afraid
• An Espresso Machine
• A Jacket with Elbow Patches
• ✔ One Good Quote in a Dead Language
• Proper Hangers
• Alternative Evening-wear
• A Pair of Heirloom Cufflinks
• Nice, Nice Sheets
• A Watch to Pass on to Your Son
• ✔ Broken-in Denim You Bought Raw
• A Classic Cardigan
• Knowledge of How to Pilot a High-performance Car Around a Track
• A Three-piece Suit
• Harry Smith's Anthology of American Folk Music
• A Denim Working Shirt
• ✔ A Dirty Little Secret
• A Good Old Fashioned (and Totally Modern) Felt Fedora
• A Velvet Blazer
• A Proper Writing Implement
• Wine Glasses That Cost as Much as a Bottle of Wine Each
• White Jeans
• A Week's Worth of White Dress Shirts
• ✔ A Go-to Joke
• ✔ A Rugged (Yet Versatile) Pair of Work Boots
• Chinos. That Actually Fit
• The Harrington Jacket
• A Fine Gauge Sweater
• Brown Suede Shoes
• The Bag, Man
• Gray Sneakers
• An Umbrella Nice Enough Not to Forget
• ✔ A Plaid Shirt
• ✔ A Gratuitously Nice Notebook
• ✔ The Perfect White Tee
• The Penny Loafer
• Go To Hell Pants
• A Classic Panama Hat
• The Pink Shirt
• A Classic Pair of Aviators