I've made a mixing chart for my Talens Amsterdam Expert acrylic paints. They are the only acrylics I have found that stay the same hue and value dry or wet. Guess my favourites! Extra marks for spotting the labelling mistake.
Why make a mixing chart? Okay, it's a bit tedious, but saves masses of time, frustration and brain ache in the long run. It also teaches you a lot about how the different pigments "stand up" to each other. I definitely recommend doing it.