Try to avoid alcohol, although one drink a day is allowed.
Times, Sunday Times (2016)
Furthermore the alcoholic learns that avoiding alcohol makes him or her feel well.
Knowles, Jane Know Your Own Mind (1991)
You should also avoid alcohol and caffeine.
The Sun (2014)
Sleep hygiene involves developing habits before sleep, such as avoiding alcohol and caffeine and reducing electronic devices in the bedroom.
Times, Sunday Times (2017)