If an attacker were to get on your network, compromise the domain, and takeover the krbtgt account, creating a golden ticket is an almost guaranteed method for persistence as long as you don't reset the password for that account -- twice.  "The password must be changed twice to effectively remove the password history."  I don't know if there's a "best practice" but according to Ping Castle, or at least its implication, we probably want to change it every 60 days.

Kerbrute:  "A tool to quickly bruteforce and enumerate valid Active Directory accounts through Kerberos Pre-Authentication"

When running Nmap, we come across a server with open SMB ports and we might run Enum4Linux to gather information about the server.  In some cases, like with more modern and hardened servers, we probably won't get a whole lot of information.  But let's say when we run that Nmap scan, we see that Kerberos is running, that gives us another avenue for enumeration.

Token impersonation is a technique that allows one user to impersonate another user -- assuming they have the privileges to do so.  In this post, we're going to use Meterpreter but this can be done with other tools as well.  I believe PowerSploit has Invoke-TokenManipulation.ps1 which will do something along the same lines.  Aside from an improper configuration, we could run into this situation where a service account has privileges, we take over that service account, and from there, we can elevate to administrator or NT AUTHORITY\SYSTEM.