When you want to influence someone to do something beneficial - but which involves difficulty and pain - use the following strategy: At first, focus him on all the benefits to be gained by doing as you suggest. Only then should you mention the specific course of action you have in mind. Since a person's attitude is a key factor in the difficulty and pain he will experience, when you use this approach, his desire to attain those benefits will decrease the pain of the necessary effort.
In general, this is a useful principle to bear in mind for anyone who wishes to take a positive action which involves some unpleasantness. Focus on the benefits and not on the pain.
Today, think of something that you know you should do but have been pushing off. Write a list of all the benefits you will gain by doing it.
(see Ralbag - Shaar Hacharitzus, no.13)