Remember the brief glance we had of John's CV in The Blind Banker?
In this meta wellingtongoose on LJ proceeds to take that cv apart, discussing what works and what doesn't work in context of Sherlock and the NHS. Agree or disagree, it's interesting reading and much of the disagree stuff (on my part) is down to what canon provided (the CV itself, and John's age) not the meta.
There will be another part to this apparently, so here is the link to the first: Explaining John Watson's CV.
If you don't remember the CV, someone has done their best to clear it up and piece it together from screencaps; you can find that version on AO3 - John's CV from The Blind Banker.