As someone who grew up with a grandmother that fed you anything you wanted when you were sick, I can understand the temptation to stray off the path. I doubt, however, it will help much.

Have lots of chicken broth, its excellent for keeping the juices flowing.

If you have a cold, get some zycam -- it gets rid of a cold quicker than anything else I know of.

Also, as silly as it sounds, put something like mentholatum on the bottom of your feet and pull on some socks before you go to bed at night. It will open your head right up.