I have had several instances in my life where I dived into what were difficult things for me with gusto - for example when I was in school and was trying to write a program in C to calculate all the anagrams , I did not even have a computer but was up almost all night writing it on a piece of paper and rushed in the morning to a place with access to a computer to test my program on paper.That was just an example - I have had several such experiences.Almost makes me think maybe you just can't "trick' yourself into anything but just have to find something genuinely fun for you to do!As long as it is fun - it doesn't matter if it is hard or not!