Caching! Cache responses where possible and have the webserver serve it instead of going to a dynamic backend (php, node, ruby, python, ...). Not worked with a

Caching! Cache responses where possible and have the webserver serve it instead of going to a dynamic backend (php, node, ruby, python, ...). Not worked with apache for a while (it is probably sufficiently configurable too), but nginx is quite resilient and makes "basic" caching very easy (proxy_cache and fastcgi_cache should cover you)