Here are a few of the most common mistakes that I keep making with my HTML tags.

1. Typing it in wrongly.
2. Forgetting to close the brackets >
3. Forgetting to use a closing tag, </b> or </i>
4. Spelling center the English way - centre - that will not work! And colour (instead of color) won't work either!!
5. Typing it in wrongly.
6. More spelling mistakes - <a herf> instead of <a href> does not work. And <img scr> instead of <img src> does not work either!
7. Using the wrong filename - file names are case sensitive. rabbit.gif is NOT the same as Rabbit.gif or rabbit.GIF
8. Forgetting to close the table, </table>. That can make your whole page disappear with Netscape!
9. Typing it in wrongly.
10. Forgetting to use the </a> tag.
11. Forgetting to use the last set of " in links - this one is particularly hard to spot because the " is so small!
12. Having an extra </b> or </i> tag. With Netscape4.0, a spare one of these acts just the same as a </font> tag!
13. ... and also points 14, 15,etc, etc - TYPING IT IN WRONGLY! (You'd think I'd learn by now, wouldn't you??)

If you are using an on-line editor, SAVE your files to your hard drive or to disk. Every time you edit ... SAVE your files! I have heard tales of woe from several different people who have lost many hundreds of hours of work when a "glitch" has deleted ALL their files and they had no back up!