Start with a phone. Ring your friends, then your family. Say you'll be leaving, that you'll be heading to God knows where. You'll have no company, no modern comforts. There will be no updates on Facebook. You will not tag your friends or post pictures. Tell them you will experience the world through your own eyes and not through the viewfinder on a camera. You will not view the world through a clip on Youtube. Tell them you will indulge in the warmth of a smile and stand high on a mountain with the sun on your face. Tell them that all you'll have in the night are the clothes on your back and the stars.