Usually my methodology is to try and do the tasks I dislike first, using the reward of doing stuff I am more excited about as the goal. That helps me push through it the vast majority of the time. I also just tell myself to stop being an idiot, just do it and be done (personally this is my way of pushing myself sometimes). No matter what, the more time spent in thought and internally complaining about a task means you will make it worse and it gets harder and harder to do, just execute and be done.

When I mentor people that is usually my advice, suck it up, do it and be done. And stop spending mental energy complaining or building it up to be something more then need be.

I am not criticizing you or anyone, we all have these tasks, just sharing my own thoughts/methods on how I deal with it.