Temptation Bundling
We're more likely to do the hard stuff when coupled with the pleasant.
Related studies:
Milkman, Minson & Volpp (2013) Holding the Hunger Games Hostage at the Gym: An Evaluation of Temptation Bundling. Management Science
Milkman, Minson & Volpp (2013) Holding the Hunger Games Hostage at the Gym: An Evaluation of Temptation Bundling. Management Science