There are a number of ways that you can contact me (John Stanley), which is probably a godsend for a lot of people that don't simply rely on a telephone to save their computer(s).
By Phone / SMS (Text Messaging) / Voicemail : 0776 159 3064
By Email : email@example.com
By Skype : Search for firstname.lastname@example.org and add me to your contacts.
NOTE: If you reach my voicemail...
You MUST provide at least a name for me to call you back, as you can understand, I don't like phoning someone up and calling them "Joe Bloggs".
You MUST NOT when hearing the start of the voicemail message, hang up and try to instantly phone back expecting me to answer the 2nd or 3rd time etc. I'm obviously very busy if I don't answer the first time and to be so inconsiderate to repeatedly call means that YOU get placed to the back of the queue.
If you do get through to my Voicemail, please give me as much information as possible in regards to your computer problem, contact information etc.