[Discussion] What are some tips on setting up a home network that you would give to newbies?

This would include certain commonly overlooked settings to a link to making your own antenna boosters (these I really want to see how far they have progressed since I last saw them. I currently have a Archer C7 v.2 and an Archer C7 v.2 - any suggestions would be great thanks! Any custom firmware etc. thanks!