css and js cache clear
Whenever you make changes to the css or js files just change the version of the file in the file link.
For example if you make changes to the style.css file which looks like below :
<link href="style.css" rel="stylesheet" type="text/css" />
Apply a version like below :
<link href="style.css?v=2" rel="stylesheet" type="text/css" />
When you further make changes alter the version like style.css?v=3. This way webmasters can escape from browser cache issues when the make changes to the files.