The biweekly link thread was recently closed, but I wanted to share this article here because it contains many useful tips from Michelle Obama's tailor. Some of these tips include (quoting directly from the article):

Boots: “I see so many women walking around in over-the-knee boots that don’t fit them at the ankle, or that hang around parts of the leg. You should get those tailored to fit your legs.”

Sleeves: “Adding sleeves is hugely popular,” she says. “So many of the dresses that are designed for a woman over 40 don’t have sleeves, and many of my clients simply want those added.”

Plus Size: “Often if an actress is a plus size and she can’t fit into the largest size that a designer makes, we will buy two and use the fabric to make one larger size,”

Different Sizes: “I also have clients who maybe wear a size 6 on the top and a 12 on the bottom, so we’ll buy the dress in two sizes and merge them together.”

Choosing a Tailor: Ask if your tailor is also a pattern cutter. "They should have the skills to make the whole garment again in another fabric or pattern if you wanted. That's the sign of a really great tailor."