...now, how does one go about doing that?

Move the reward closer perceptually . i.e., imagine already having the rewards you will get, viewing them as imminent and certain.

This is not a panacea, of course; there are dozens of things that can interfere with you actually doing it, as I mentioned in my video on this. And one I didn't mention is that if there is anything you perceive as bad about reaching your goal, then that is also going to be magnified by bringing it perceptually closer to you.

That is, changing your discount rate for an item applies to the bad as well as the good. (So if you have a "fear of success", this may actually enhance it.)