I've been using TaskPaper for a year now, and it is great for list-making and is all in plain text. As a side-tangent, TaskPaper may look simple and like another note-taking-to-do-list app, but it really is intuitive and amazing, especially when it comes to its powerful shortcuts and the ability to seamlessly move around lines of text. Source: about 1 year ago

I use mobafire.com for more in depth guides. Most of them have detailed explanation for item choices as well as tricks/combos for your abilities and general playstyle. Source: about 1 year ago

Hi! I recently picked up the support role, coming from the Toplane. I have been enjoying Rakan, Janna and Morgana a lot, and after an ARAM where I got Renata and really enjoyed her, I wanted to try her at Rift. Usually, when im going to play a new champ, I check mobafire.com to read some guides and have a grasp of knowledge before diving into the game itself. I also check some op.gg stats. Source: over 1 year ago

Some mobafire.com guides made by pros at Sylas can contain general match-ups of Sylas and what are his worse counters, some even include details as to why, but you'll have to look for them. Source: almost 2 years ago

Then they changed it, I was checking on mobafire.com, where second laser is less dmg even in ap ratio. Source: about 2 years ago

Use tools or guides to find out which runes and items you need to build on your chosen champion (e.g. u.gg or mobafire.com). Source: over 2 years ago