What are the resources you find useful in designing your own systems? I will post a couple that I find helpful.
Here are some links to reddit forums I found useful:
And here is a twitter account from a guy who does computer game level design that has a ton of stuff that is very applicable for TTRPGs. Here is an example: Implicit information vs. explicit information: https://twitter.com/the_Norberg/status/1290548444508098565
For example: here