According to Alcohol Change UK, who spearheaded the very similar Dry January challenge, giving up alcohol this month will help you sleep better and have more energy, improve your mental health and concentration, give you brighter skin, help you save money and feel an amazing sense of achievement. “Although it may feel like you get to sleep easier after a night of drinking, that sleep is usually broken by dehydration, trips to the bathroom and less rapid eye movement (REM) sleep than normal,” Merrifield explains. "If you’re used to drinking a lot, don’t be surprised if you feel like it takes you a little longer to get to sleep though, this will improve as you get used to not having the sedative effects of alcohol in the evening."