https://www.cloudflare.com
Sign Up for an account if you haven't yet.
Add a domain and have it scan the DNS.
After it scans, click next it will show you your DNS records, just click continue
Select your plan info.
It will then tell you to visit your registrar and change your Nameserver info.
CloudFlare will Manager your DNS moving forward.
Transfer the Cloudflare account to the client
Recommended configurations
Speed
Auto Minify
Accelerated Mobile Links
Firewall
Reduce "Security Level" from High to Medium (the recommended value)
Crypto
Full SSL (strict) (because CF recommends using it)
Always use HTTPS
Automatic HTTPS Rewrites (just in case we accidentally introduce an HTTP resource)
Scrape Sheild
Turn _off_ "Hotlink Protection"