I keep my shard pull mercy in a discord thread, but that's it.

I dont. The closest would be roster pics we'd occasionally update in discord, but I haven't done that in ages.

I'm lazy. But I know many who keep track.

The only thing I write down are thoughts about champions and teams. A lot of time can pass between thoughts and implementation. Due to laziness and resource conservation strategies. 

I have been monitoring shard pulls, CB chests and Hydra rewards for the better part of my 3 years playing the game (excel sheets)...but I stopped it and now look at the statistics from RSL Helper to find out about merci count etc...

I dont track anything personally, but for early and mid game players especially making a list of priorities is a good idea.  It's very easy to get pulled in a ton of different directions if you don't. 

I'm too busy deleting spam to have time for any more notes

You should be taking extensive notes and running comprehensive market research on which CBD gummies are the best value to give to your Exotic lady friend who's also taking Weight Loss pills.

I wish I could do that (too lazy)  . It would be very helpful

only thing I write down might be notes  from our many CCs  on Youtube of champion builds  or tips

usually  iphone  pic the mastery pages   from youtube

oh and jot down any promo codes from youtube. at my age the memory will not retain that info over the period  of the 5  minutes  it takes to get back in the game :/

This is exactly what I use it for, I get easily distracted by squirrels, so it helpsme remember that oh yeah I'm supposed to be building up those hydra teams, etc. 

Yup I've heard this from quite a few people now.  Makes sense as you need to build what feels like 40 different teams.

Good tangent to ask again for more team presets...

Look at you sneaking something productive into this conversation.  Who are you and what have you done with Trips?

have to learn to read between the lines with Trips sometimes, noob 😔

I'm apparently the worst person in the world for this.  I keep a roster of all my non-food champs.  Rarity, Affinity, Type (support, HP, DEF, ATK) Buffs, debuffs, instants, auras.  Who needs masteries, books. Which ones I sucked at when gearing.  Who is my next 6*. Who my best teams are for dungeons WRT time, debuffs, and turns.  Doom Tower, Hydra.  I keep comparisons of similar champs, who is better at what. Who are my best nukers, potential glass cannon teams.  Faction Crypts teams for crypts that I haven't cleared.  Levelling priorities per team.

I'm horrible

edit: All this is in an Excel Spreadsheet

I'd subscribe to your spreadsheet if it could be auto populated from the game data.

Be fascinated to see the number of naked booked legos, pvp champs I use with unselected masteries... 

This is an impressive level of commitment TBH.