Oh my head!!!
SIGN have a good resource in terms of diagnosis and management of headache. Here is the quick reference guide.
Neural pathways can be confusing, to help illustrate these try the National geographic 3D brain, a fun and informative model for a doctor or patient education. A more portable version is 3D Brain an iOS app for the iPad and iPhone.
Depression: can be a challenge, here are some online resources that may help in those tough spots:
Living life to the full is a versatile online CBT resource
MoodGYM is a similar resource even supported by NICE. I also find Big white wall and Headspace really useful patient orientated systems.
For the more difficult aspect of switching antidepressants, try the excellent resource from MIMS, unfortunately, it is behind a paywall.
Alternately a handy resource is this wiki called Psychiatrinet. Maintained by pharmacists and psychiatrists it is a comprehensive guide to how to switch a variety of antidepressants and antipsychotics with cautions for relevant situations. Truly a useful primary care resource.
Substance misuse, particularly alcohol, make managing mental health difficult.
SMMGP is a great place for forums, relevant NICE and RCGP guidance, e-learning modules, links to suite of RCGP drug, alcohol and Hepatitis B and C certificate courses
A helpful resource is Scope with health resource links tailored for those with learning difficulties.
While often parents may have explored the site prior to diagnosis, the National Autistic society can be truly helpful resource