There’s nothing worse than stocking up at end-of-season sales only to find the clothes you bought look dowdy or outdated in just a few months. After all, it’s not a bargain if you hate wearing it. To steer clear of buyer’s remorse, take a cue from the just-ended New York Fashion Week’s Fall 2010 lines. Whatever’s being shown there is going to be in stores this fall. If you pay attention, you can get a jump on the trends by pouncing on the sale pieces that have staying power, and passing on the ones that are fading into obscurity.   

Pick up some plaid. Designers like Nanette Lepore, Anna Sui and L.A.M.B. sent plaid pieces down the runway, ensuring that the pattern will still be hot come fall. Plaids–especially in heavy fabrics like wool–tend to be great bargains at the end of winter. Pick up something like this Plaid Swing Jacket from Spiegel  and you’re sure to be stylin’ in September.

Vests are best (bets). Vests were everywhere on the runway–topping everything from skirts and pants to evening gowns–and made of every fabric and texture. If you’re in love with a luxe vest–like a fur-trimmed or leather one–and spy it on sale, don’t be afraid to snatch it up. I love this leather Grommet Vest from William Rast (grommets and studs are still going strong for fall, too).

Be a softy. In addition to more typical fall colors like navy and burgandy, a surprising number of designers used muted hues like sage green, sky blue and mauve in their Fall ’10 collections. A sweater like this Mossimo Black Ultrasoft Vee Neck Sweater will be perfect for both cool spring nights and crisp fall air. If you’re a sucker for pastels, go nuts! Showing your softer side will be an asset this fall.