I have significant recurring difficulty with this. Meds help me lift my baseline, but aren’t everything. Some tips that have helped me regardless of meds, and could apply to anyone is - find something fun or rewarding about it. Even if it means turning it into a game (break it down into the smallest task and ramp it up like you’re smashing the early levels of a game). Envisage how relieved you will feel when it’s done so it feels like a worthwhile goal - though don’t get stuck in the fantasy! I also recommend others tips here about wearing something different/creating a separate space for work, and writing out tasks and dot points by hand.

Usually what has the most impact, though, is the adrenaline of a deadline :(