Try run in the morning - then you have done it! If you happen to later on its a bonus. Keep your running mind positive.
Control your mind, when running only focus on the present, forget the past and ignore the future; run in the moment!!
Final week before a big race, try scare yourself out of the race, then the night before fall asleep thinking of something else.
Make a commitment - enter a race and have a goal to work towards; it makes running so much easier.
When racing and you hanging in there; play mind games: 10km togo: don't count last km, you gone past 10km the you only 8km togo