Ask HN: How can I trick myself into enjoying tedious tasks?

I'm currently interning at an analytics company, and part of my work is low-level tasks like going through customer accounts, logging some figures in a spreadsheet, etc. Low skill, repetitive tasks. Outsourcing this isn't an option because we have sensitive data.

How can I trick/hack my brain into tolerating this until completion? I know that dreading it and mentally complaining about it every second will only make it worse. Maybe rewarding myself with a bite of chocolate after every completion? Any psychological hacks?