Don’t overbuy. When you contemplate an article, judge whether or not it harmonizes with items you already own. Again, avoid exaggeration of current fashions. It’s best to be inconspicuous. But inconspicuous does not mean dull. Extreme dullness can be conspicuous in itself. Just do the best you can.
Excerpt from Cary Grant’s long article on style, which he penned in 1962. The full piece is available at Keikari.