The other end is the mastering of the final mix where levels are concerned. Again here it is best to leave a good ceiling for the mastering process if you intend to master it
I read an article which suggests a good -6Db on the final mix to give the mastering process headroom to bring the recording up to final produced levels and it was a mastering tech who put that statement out.
So that helps with the start levels and end levels to mastering the final. What you do inbetween is a matter for artisitc licence ! How much reverb delay chorus and so on. Less is more as they say !
A good set of monitor speakers are also very important .


