How to sharpen a saw

This is what I found on the web site eHow. Has anyone used round files for sharpening a saw?
Sharad

How to Sharpen a Saw Contributor
By eHow Contributing Writer
Article Rating: (20 Ratings)
Although saws are tedious to sharpen, you don’t need to do it more than once per season, and the time spent will make your cutting chores much easier. You need a round file and a vice – and of course, a dull saw.
Things You’ll Need:
• Linseed Oils
• Lubricating Oils
• Round Files
• Vises

1. Step 1
Lock the saw blade into the jaws of a bench vice, teeth pointing up.
2. Step 2
Use a round file to sharpen each individual tooth. The teeth have a beveled side and a straight side; sharpen the beveled side.
3. Step 3
Run the round file between the teeth to sharpen. You should see a new, shiny edge as each tooth becomes sharp.
4. Step 4
Continue sharpening the teeth until you have done them all.
5. Step 5
Turn the saw over in the vice and sharpen all the teeth on the other side of the blade.
6. Step 6
Spray the blade of the saw with a light lubricating oil to preserve the finish and prevent rust.
7. Step 7
Coat the wooden handle with a light coat of linseed oil.

-- “If someone feels that they had never made a mistake in their life, then it means they have never tried a new thing in their life”.-Albert Einstein