There are some cold medicines out there that my friends and family and I have tried. Our results:
Mucinex: This stuff really does clear out mucous. It won't however, clear up pneumonia. (Someone I won't name really did think this would work.) Nevertheless, it's worth the price, and cheaper store brands area available that contain the same active ingredient (guaifenesin).
Umcka Cold Care: I've popped four or five of these a day since Friday, when a cold started coming on. It's Tuesday and my cold is gone. I didn't have sinus pain or a stuffy nose at all--just a runny nose that felt like hay fever. Buy this with a box of tissues.
Sudafed PE: This works as well for me as the original Sudafed. If I'm really congested, I have to take several doses (as directed) to get relief. The store brands are cheaper; look for phenylephrine.