Keep Your Blood Alcohol Levels Low
Experimental studies suggest that people generally require a peak blood alcohol concentration of at least 0.10 percent to get a hangover the next day. To figure out your blood alcohol concentration, consult a blood alcohol chart, which breaks things up by weight and sex. Such charts will tell you, for example, that a 150-pound male can have four drinks in an hour before entering hangover territory, while a 150-pound female can only have three. But keep in mind that alcohol affects everybody differently – some people can get a hangover from just one or two drinks (blood alcohol concentration of less than 0.05 percent), while others appear to be naturally resistant to hangovers.