There are many things that all webmasters must do on a regular basis to ensure that their web sites remain useful and functional. Some of the tasks you should be performing are listed below.

Promote
You must promote your web site constantly. Every single day you should do something, anything, which attempts to get people to your site.

Check your links
Another task that must be performed on a regular basis is checking for "link rot". This is the tendency for broken links to appear all over a site. It is most common with external links.

Change Your Site
If your site is static and unchanging there is no reason for someone to come back again Change the content constantly and to be sure that your visitors know it is changing.

Monitor Your Site
Subscribe to a service which checks your site on a regular basis. This is important, as if your site is constantly "bouncing" you will find it being removed from search.

Review Your Statistics
At a minimum, you should check your page counts to be sure that your site is being viewed. At best, you need to know where people are coming from, which browsers they are using and what they visited while they were at your site.

Publish a Newsletter
This allows interested visitors to be updated on events and new materials published on the site, and gives the webmaster a method for communicating with his audience at will.

Stay Up-to-Date
Webmasters need to stay up-to-date on new technologies which they can use to improve their web site.

Review Your Site
When you look over a page, check your grammar, spelling and accuracy. Remember that as time progresses your articles may become stale.

Check Your Site's Security
Learn as much as you can about web site security, and ensure that, to the best of your abilities and knowledge, that your site is secure.

Protect Your Visitor's Privacy
Post a privacy policy and adhere to it without exception.