I have the same problem with distractions. Usually I blame the book, "Don't want to read this anymore, must be a crap book". My two methods for trying to keep at it are:

1) The Pomodoro Technique

2) If possible bend the exercise to fit my specific goals

On another note (not specific to picking up clients) I found the book www.businessmodelgeneration.com to be really helpful in my business explorations.