This seems like an odd idea, I know, but it really is true that baking soda has a million and one uses! This method of shaving (not my own creation, but i don't know who's) has worked better than any other way I've ever tried. I tend to get a closer shave with less irritation, and get to save money on razors, shaving cream and after shave! I think the whole concept is based around the baking soda removing the oils from your skin and facial hair which allows the razor to cut better and last longer while doing the same job as your after shave by lessening irritation and preventing oily skin caused by most shaving creams.
What you need : baking soda, hot water, a razor and, of course, facial hair.
What you don't need : shaving cream or after shave
My razor is a disposable that has lasted over a month of daily usage thanks to this new method. I used two a week with shaving cream.