I don't doubt that all these are repeated elsewhere, in 1000's of pages. That's the good, and bad thing, of the Internet. There's a bunch of information. Unfortunately, especially when it comes to IT, much of it is out of date (or not updated), totally wrong, or written by armchair amateurs. You know, some of the same ones that clog up the Internet with horrible web pages that start with "Welcome to my page" or similar.
So let's get started......(in no particular order)
1. Bloated files/pages.
This could really be 2 categories. Firstly bloated pages. These are the ones stuffed with gigantic pics that allow you to cook dinner, wash the car AND do you shopping while the page loads. Second are bloated files. PDF's are great used properly, but they can be big. I like to offer my visitors the option of saving/opening a PDF, or viewing as a plain HTML page. Yes it takes more work on the part of the designer, but it's much more user friendly.
2. Visited links that don't change color.
When users have visited somewhere, they like to know it. Not coding links to change color when they've been clicked is insulting to
