When the going gets tough, take the time to review you list (you have one, right?) of all the benefits you're deriving from LC.

My (partial) list:
no heartburn
no heart palpitations
lowered cholesterol & triglycerides
fewer headaches
better sleep
no more wild blood sugar swings
better appearance
more stamina for daily life
my husband thinks I'm hot!

Start your list. Review it as you need to.