Siket says that referencing the mixes by comparing them to similar tracks is key. He mentioned a couple of applications which are designed specifically for this:
MC Compare by Melda Productions, which sells for $69.
ADPTR Audio Metric AB from Plugin Alliance, which is $199.
Then there’s Reference 4 from Sonar Works, which you can use to calibrate your speakers and/or headphones to remove sonic mirages generated by your specific environment, mixing with a flat, accurate sound.
Nugen Audio offer powerful tools in the mastering realm, in particular, Mastercheck.
4/08/2020