Best practices - site power down

Hello All,

My Company is doing a site power down (my first) in the next couple of weeks.

I have done some google searches for checklists and best practices for the networking side of things, Eg start from the outside and work inwards (firewall > router > switches > wifi)

Does have one have any tips, things to look out for, checklists, websites (or threads) that I should read?

Thanks in advance