Tip#1- Web page file names: You should always name the first file your main page on your web page index.html (*.html) extension. So that your web page will be automatically loaded when people go to your web site.

Tip#2- Web page file names: You should always use lower case (NEVER UPPER CASE) in all of your file names. And remember to use *.html at the end of all your file names.

Tip#3- Web page file names: It's also best to use filenames without spaces and without special characters. This also includes the filename of photos or scanned artwork in your web page. 
Examples of good filenames ie)
helens_artwork.gif 
helen_n_troy.jpg
helen_ward_poem.html