I think good rules of thumb for minting are:
1.) Will the money pay itself back?
This expands into: Am I spending the money to either build money-generating improvements, protect myself in a major war, or expand enough to compete in my area?
2.) Am I getting the most out of my minting?
Minting increases based on the percentage of your economy you tap. Thus, you should try to only mint when your economy is in the best shape you can reasonably get it - high stability and maximized trade. Minting at -3 stability is just digging a hole (unless it's your last ditch effort to fend off destruction).
3.) Am I minting money to get myself to the next economic level quicker?
Minting to build workshops, tax assessors, and manufactories are generally considered safe bets.
4.) Did I remember to move the slider from Stability after getting Stability 3?
If those 4 criteria are met, then minting may be better than not minting.
1.) Will the money pay itself back?
This expands into: Am I spending the money to either build money-generating improvements, protect myself in a major war, or expand enough to compete in my area?
2.) Am I getting the most out of my minting?
Minting increases based on the percentage of your economy you tap. Thus, you should try to only mint when your economy is in the best shape you can reasonably get it - high stability and maximized trade. Minting at -3 stability is just digging a hole (unless it's your last ditch effort to fend off destruction).
3.) Am I minting money to get myself to the next economic level quicker?
Minting to build workshops, tax assessors, and manufactories are generally considered safe bets.
4.) Did I remember to move the slider from Stability after getting Stability 3?
If those 4 criteria are met, then minting may be better than not minting.