Food and mood: how do diet and nutrition affect mental wellbeing?BMJ 2020; 369 doi: https://doi.org/10.1136/bmj.m2382 (Published 29 June 2020) Cite this as: BMJ 2020;369:m2382
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The above mentioned song title covers four of the five pillars of mental and physical health. They are as follows:
"Eat" a well balanced nutritious diet with the ingredients discussed in the five feature articles in this issue of the journal.
"Sleep" 7-8 hours a night. Without good restorative sleep every 24 hours the well described negative effects on cognition, mood, morbidity and mortality appear. See "Sleep is the Best Medicine." 
"Bicycle" sport or any regular exercise has been called the Miracle Cure by the Academy of Medical Royal Colleges in their 2015 document. 
"Club" or social gathering or friends and family are protective factors for good mental and physical health. It is well documented that isolation and loneliness are associated with poor mental and physical health and reduced survival. 
Finally, work or occupation is that last pillar. Work gives a purpose to life, social standing and money. The downside of unemployment and having no substantive occupation in life include depression, self harm, substance abuse, poverty, and physical morbidity. 
The present pandemic has forced people to get off the roller coaster of eat/sleep/wake/(nothing but commute) and caused many to take stock of the way they are living. This can have good effects on physical and mental health. People may spend more time with their children and family, may reduce commute times and days, may decide that extra time at home is worth more than extra money. Quite a few health professionals have told me they have spent much more time with their children, have done more gardening and DIY and really think that this might be the way to go. Mental and physical health are lifestyle choices that everyone can adopt to their own situations. The benefits to child wellbeing and health are also substantial.
1 BMJ 2019; 366 doi: https://doi.org/10.1136/bmj.l5605 (Published 19 September 2019) Cite this as: BMJ 2019;366:l5605
2. BMJ 2007; 335 doi: https://doi.org/10.1136/bmj.39419.464063.59 (Published 06 December 2007) Cite this as: BMJ 2007;335:1216with impaired physical wellbeing.
3 BMJ 2016; 353 doi: https://doi.org/10.1136/bmj.i2269 (Published 21 April 2016)
4 BMJ 2009; 338 doi: https://doi.org/10.1136/bmj.b829 (Published 11 March 2009) Cite this as: BMJ 2009;338:b829
Competing interests: No competing interests