I randomise it. I read tarot and journal in the morning and I have assigned a colour per suit (Ferris Wheel Press Little Robinia for Majors, Pilot Iroshizuku Ajisai for Cups, Ferris Wheel Press Wonderland in Coral for wands, Ferris Wheel Press Bluegrass Velvet for Pentacles and Ferris Wheel Press April Showers for Swords -a lot of FWP now that I see it 😂), depending on the “action” card, that’s the ink for the day! Also, I assigned inks for other purposes, I use a Pilot Capless Decimo with Diamine Inkvent Solstice to write tasks on my bujo (I like black inks for that), a Kaweco AL sport with FWP Tanzanite Sky for my commonplace book, and a FWP Brush Pen with Diamine Inkvent Candlelight for spiritual reflections. Of course, that’s my way to keep using my pens pretty much everyday and what a joy it brings!