Do borrow your husband's clothes. Don't wear acid-washed jeans. Cropped pants can make you look shorter. Do wear a hipslip or minimizer under tight clothes. Patterned leggings can make legs look heavier.
Monochromatic outfits are one of the best slimming secrets there is.
You shouldn't wear suede shoes in summer or patent leather in winter. Handbags have to match your outfit. Black is boring. If you wear two pieces that are both navy, the colors have to match. A plaid minikilt isn't for everyone, for example.