I Hate Hue
If you read the post titled Color or Black and White?, you may have already tried to convert some of your color pictures to black and white. I bet your results weren't very pleasing. That's because converting a color picture to black and white doesn't give the same quality as you get with a black and white original.
That is, unless, you really know what you're doing.
The article entitled I Hate Hue from the website of Popular Photography & Imaging magazine should be a great help. They have two easy-to-follow processes to convert color images to black and white in PhotoShop.
If you don't have PhotoShop, you'll have to try to take a few pictures in black and white and color without changing any other settings, and moving the camera as little as possible.