Suits, like so many public officials these days, suit jackets spend much of their lives in the closet. And the bestway to maintain their structure and shape is with hangers that mimic the slope and width of your own shoulders. To prevent any wrinkling, hang your suits, shirts, and trousers with some room between them.
When it comes to shirts, even they need solid support to reduce stress on the seams. They won't get that from those white wire hangers you get from the dry cleaner. Invest in a handful of sturdy wooden hangers and you and your shirts will look much better much longer.
Believe it or not, a good trouser hanger maintains a sharp crease and causes as few wrinkles as possible at the fold. A felt-lined clamp hanger, like the one pictured here, or a felt-lined trouser bar accomplishes both.