I recently setup a Siteleaf site and corresponding Gmail account via DigitalOcean. It occured to me these steps may be useful to people looking to do the same.
If you've already created your Droplet, installed vsftpd and apache, skip to step 4.
DO - do this step on Digital Ocean
SL - do this step on Siteleaf
GA - do this step on Google Apps for Business
REG - do this at your domain's registrar