What gets our team annoyed. Yep emails.
We have seen some really nice designed work vans, with great looking logos. Yet the contact email is 'someone@gmail.com'. WHY. You have spent a fortune on sign writing your Van. Get some hosting and simply, within Cpanel, create an email at your domain, e.g. me@mycompany.com. Its even easy to set up a forwarder to send those emails from your website to your personal address.