Thanks @Chimoia. I don't subscribe, could you say what the 5 things are?
In terms of people asking why the NHS isn't advising this, I think there are a few reasons. The NHS is about providing adequate health care to the population at large. It does not exist to optimise an individual's health and well-being. It looks at things at a population level, so if it were to start advising people not to drink after the vaccine that could put off loads of people from having the vaccine, so at a public health level it would do more harm than good. It also complicates things and at the moment the most important thing is to get as many people vaccinated as quickly as possible.
I don't think that drinking alcohol or taking paracetamol or eating a bad diet etc. will stop the vaccine working. But if, as an individual, you want to optimise your immune system response to the vaccine there are things you can do that could help. They may only help in a small way but, for me, having lived under the threat of a potentially deadly virus for a year (I'm vulnerable) I will do everything in my power to help my body react the best way it can to the vaccine.