Welcome to my favorite subject, Dawn. I'll be happy to help.
First of all, don't think in terms of clothing items. It's easy to fall in love with that sweater on the rack or that skirt in the window, but it's wise to overcome that mindset. Don't shop for items. Shop for overall looks. When most people look at you they see a sum total, not the individual goodies.
The best way to start this is by doing some look-shopping before you do your clothes shopping. Go a week or so paying attention to the people you see, taking note of their overall looks and what clothing items make it work. You don't even have to go out to do this. You can do it watching TV, looking at magazines or cruising the Internet. In fact, that's one of my favorite ways.
I'm a shameless celebrity watcher, myself and watching celebs can be a great way to pick up look ideas. Celebs pay top stylists big bucks to dress help them put together their looks, so why not follow their lead? Choose a celeb with a figure and style sense you like and start watching them. Do a Google Image search for tons of pics of them on the street and such. Of course, you can also check the fashion sites for celeb and runway pics in your look search. Save pics and look closely at the components. They're always ungodly expensive, but you can almost always match any look for very little money with a bit of creative shopping.
Shop online even if you're not going to buy online. You can see what's hot and what price ranges are before going to the mall or big box.
Anyway, I hope that helps.
~ Lyric ~