In my experience you have to have a constant stream of motivation flowing throughout your journey be it in form of revenue generated, excitement from milestones

In my experience you have to have a constant stream of motivation flowing throughout your journey be it in form of revenue generated, excitement from milestones reached or whatever else it might be you have to find what drives you and make sure you get constant dose of it. What I think a lot of people believe mistakenly is that the rewards must be huge, but the way motivation works can just be based on small rewards as long as there are many of them and not too far in between. Other examples of reward can be publicity you receive about your product, growing prestige you gain among your peers on a regular basis, number of growing users and their dependence on your product, etc. What must never stop is 100% focus on the market you are in it’s ok to deviate from the original product, but never ok to change the field/vertical you are in, that’s what demotivates, you are no longer moving forward in one direction but changing direction and not making much progress in one particular direction so you might as well start something completely new, thus “feel bored”, ...