Without any particular experience, Id say keep some data for a little while. Shot time, bean age, and grinder setting.
eg, say your last beans were dialled in, and you get a new batch, and its suddenly 10 seconds faster. Do your dial-in routine to get ack to a proper pour, then record how many clicks adjustment you made.
Repeat as necessary, and hopefully in a short time youll begin to see a pattern, so that eventually youll be able to say "hmm, new beans, 20 second pour, looks like I need to go 3 clicks finer" (or whatever it is).