Two ways:
  ~On your phone, as text messages
  ~On the Twitter website

Simply type into your internet browser:
~http://www.twitter.com/drewhayes to follow Drew Hayes

~http://www.twitter.com/ttotty to follow Tim Totty

Directions for getting started on Twitter:            
~Open up your internet browser
~Type in www.twitter.com
~Join by choosing a username/ password
~Begin searching “drew hayes” and ask permission to “follow” his postings.

It's FREE!! But if you use mobile texts to send or receive updates, make sure you have a data plan for your cell phone.