Other Ways to Tap
A good technique for making breakthroughs while tapping by yourself is to tap while talking out loud about your issue and looking yourself in the eye in a mirror. You might uncover things that you didn't even realize were there.
I found another interesting method of making breakthroughs without specifically thinking about things that bother you--by tapping while singing along with the song on the radio! (or a favorite hymn, show tune, whatever) Would you believe that tapping while singing along with "Sweet Child of Mine" by Guns 'N Roses brought me to tears? I never thought Guns 'N Roses would make me cry! Try tapping while singing along with a song you really like, and see if you have any releases! There is a song that we sing at my Unitarian Universalist Fellowship called "How Could Anyone Ever Tell You?". This song made me cry every time we sang it. Finally I spent some time singing the song with tapping on myself, and now I can sing the song without breaking down. I have cleared whatever the heavy emotional attachment was that I had to the words of that song.
PET (Provocative Energy Therapy) is another tapping technique, also developed by our Aussie friends, Steve Wells and David Lake. PET requires two people because one person is "provoking" the other (although I must say that I have attempted to provoke myself sometimes, by agreeing with my own negative self talk while tapping!), using provocative techniques developed by Robert Farley. Provocative therapy works by acknowledging the "dark side" that most of us try to bury, to our detriment. Jung said "One does not become enlightened by imagining figures of light, but by making the darkness conscious."