Avoid redirections
Redirections should be avoided as much as possible as they slow down response and drain resources unnecessarily. These redirections can take place on various levels: HTML code, JavaScript code, HTTP server and application server (e.g. PHP).
Only install essential components on the server
Uninstall any services that are not vital for running the website. This will inevitably remove daemons (programs that constantly run in the background) which drain resources such as CPU power and RAM.