Web Design Basics to Avoid on Your Site

Hi,
As a web designer, you should design your websites to give your visitors the greatest ease of use, the best impression and most important of all a welcoming experience. Here are some common web design basics to avoid on putting your site for it doesn't matter if you have the greatest product in the whole world if your website is poorly designed you won't be able to sell even one copy of it because visitors will be driven off your website by the poor design.
When I'm talking about a "good design", I'm not only talking about a good graphic design. A professional web design will be able to point out that there are many elements which contribute to a good website design, accessibility design, interface or layout design, user experience design and of course the most straightforward, which is graphic design.
Hence, I have highlighted some features of the worst web designs I've come across. Hopefully, you will be able to compare that against your own site and use it as a road map and if anything on your site fits the criteria, you should know it's high time to take severe action!

1) Background music

2) Extra large/small text size

3) Popup windows