Different artists have different workflows. But I think most can agree on common practices that make nuke run faster, and stay more organized, allow you as an artist to do your thing and output renders quickly.
I have my own list of Steps I have written sort of as a compositor's Checklist. I believe I posted this checklist in a blog awhile back, but I will give you guys the link to check it out. I strongly suggest you write these down and keep them on your desk at work. It is invaluable when you are starting out. The blog was down so I'll just post it here:
I am also going to link you guys to the 2 most useful articles about nuke optimization I have read online. Both have saved me tons of render time and have made my scripts more organized and easy to navigate. Links Down Below.