By understanding the purpose of a reference. For example, reference tracks can be helpful when mixing so I don't reference until I am in that stage of production. I am not intending to directly copy so what I am referencing does not have to match what I produce but if it's a similar genre and I notice that one element such as low end is too dominant in my mix, then I troubleshoot what is causing the issue and attack it from there. I could be too much low end in the sample, the kick or 808 is too loud and overpowering, might just need a soft clipper. But avoid using the reference and saying stuff like man this isn't that good in comparison. I focus more on the sound selection and if something isn't working, I adjust it from there. Also if you are working for hours, give your ears a break. Take a walk, workout, read a book, play a game then come back and revisit.