When should you stop asking your PhD advisor to do advisor like things? After you have finished a PhD when does it become inappropriate to ask your advisor for advice, read over a manuscript, or do any other "advisor things"? Presumably if every student an advisor ever had continued to act as if the former advisor was still his/her advisor, the professor wouldn't get anything else done. Basically how should one interact with the former advisor once the PhD is finished?
My advisor, at two different points in my academic career, said:


"I am your advisor for life. You can always count on me."
"I think it's time for my old students to start finding new people to comment on their work."


I took away from this that your advisor should always be available at some level, it's part of the point of taking on students. You are part of their scientific (or otherwise scholarly) contribution. At the same time, post-PhD you have to develop your own network of support, which is part of your growth as a scholar.

But how do you know when to do this? I think the best answer is simply to ask your advisor (see, they're always there to answer the hard questions). Hopefully they'll give you an honest opinion - either to keep asking them for help or that they think you're ready to fly on your own. Either, if you don't feel confident that you have enough peers to count on, it's probably a sign that you both can still ask your advisor for help and that it's time to put some more energy into expanding your professional network.