wardrobe woes: topping it off

I always find myself stocking up on skirts, pants, dresses, and little jackets. My closets are overflowing with them, my drawers packed to the brim. But... uh, I seem to be missing something...

What top do I wear with those awesome new pants? What do I slip on under my new jacket?

the perfect top! ...but where'd she get it? via street peeper

It seems I have trouble topping it off, so to speak. Tops are the hardest thing for me to buy--whether they just don't fit my petite chest in the right way or I simply can't justify spending nearly the cash on a silk top when a dress is slightly more. My major Christmas wish? A new, effortlessly cool, super-versatile collection of wear-forever blouses.

The question is... where can I find them? I'd love your tips and tricks!