For the most part, great advice. I would warn against strictly following #5 regarding heavy compression with a 5:1 ratio...especially if this is just for
recording vocals. If I EQ/compress my vocal signal that I send to my DAW, I will do so less than I really need to, as it's easy to add later and fine-tune. Starting off with an over-compressed sample makes future fixes much more difficult...
The idea with heavy compression is very dependent on the source track and its style and implied dynamics. A screaming/metal vocal won't have any problem, but a soft ballad or less dynamic vocal track will sound artificial when excessively compressed.