This is a good idea for a thread. I'm sure many folks will benefit from it. Actually, fashion experts and stylists have been tackling this problem forever when dressing models for magazine shoots or dressing celebrities for TV and such. While I've read books on effective dressing techniques, I find I learn the most from simply observing frequently photographed celebrities, who pay these people lots of money to dress them to correct all their body flaws. A good shortcut is to look around for a celeb with a body type similar to yours and then take dressing cues from them. For instance, I found that TV talk host Kelly Ripa has a body silhouette almost identical to mine, though smaller in scale. We are both long waisted, thus we have to avoid long tunic tops and low-waisted jeans, for instance. Anyway, I watch her on TV every day and I can basically look good in any fashion style that looks good on her.
I'm sure there are are wide shouldered, narrow hipped celebs who deal with that issue, too. There are some general things, though. Buy jackets with shoulders a bit on the narrow side, though not enough to look odd. Darker colored tops on lighter lower clothing helps. Avoid bulky, flowing tops over close-fitting things like turtlenecks and such. As for the hip area, you want to buy pants and skirts cut with waist that tends to taper in some and spread a bit in the hip area. And, of course, surface design can help. Avoid wide necklines or horizontal lines near the shoulders, but in the hip area, it's fine. Conversely, vertical lines near the shoulders will give the illusion of being narrower there.
~ Lyric ~