I recently posted a discussion on osteoporosis that was based on a MNEMONIC, using the word itself as the basis of exploring the Risk factors Evidence that you have Osteoporosis is hidden, and are discovered by Dexascan, or when you suddenly have a major fracture.
DEPRESSION is common, but sneaks up on you. It may be a job to discover that you have it, to DIAGNOSE it, so that you can be treated. The diagnosis has about 10 markers that can be formulated into a mnemonic, so that you can remember what they are. My favorite is by Paul Blenkiron, writing in the BMJ:

These 10 symptoms are described in the 10th edition of “the international classification of Diseases. The problem with some mnemonics is to remember the mnemonic itself.
Not here. Interestingly, The 4 PILLARS OF HEALTH are each represented in this list. 3 of them are valid TREATMENTS for DEPRESSION, as you will see in the following articles. When I looked up intellectual stimulation as a treatment for Depression, all i found was electrical or magnetic deep brain stimulation.

I can’t help but believe that INTELLECTUAL STIMULATION itself would at least help ward off much Anxiety and Depression. SLEEP has an interesting relationship to depression. Lack of sleep can be a CAUSE of Depression.
Recently, deprivation of sleep has been used to TREAT episodes of severe depression. Obviously there is a lot we don’t know. Another puzzlement is the several week delay in the effect of SSRI medications. I acknowledge that throughout history many great intellects have manic-depression, which may be key to their productivity.
Depression itself is credited with deep understanding. The “black Dog” of depression is best avoided, however. A HEALTHY LIFE STYLE SHOULD HELP WARD OFF DEPRESSION.