I mean, you just go the first time. Then when it is "tomorrow". You just go again. Then the next day ... again. It's not that difficult a concept, the only thing you must take care of is that you don't break the cycle.
When I was still going to a gym I was there two hours every evening, at the same time, no matter what. When I suddenly couldn't afford it anymore it was horrible ... all that free time and nothing to do with it. Sure, eventually new habits formed, but it was hard as hell.[1]
Really the only thing it takes is a bit of stubbornness, all these silly tricks into making yourself more stubborn are just that ... silly. You don't need them.
There's nothing easier in the world than making the same default decision every day. Doesn't even require much thought.
[1] this was a few years ago, got into boxing when I had the money again, then became broke and am finally getting back to boxing this week ... money's a bitch like that, luxury-ish expenses are the first to go
edit: why all the downvotes? Picking a habit and making sure you don't break it is one of the most effective ways of sticking to something ... http://theclosetentrepreneur.com/seinfelds-secret-motivation...