Don't participate to political elections, neither as an elector nor as a candidate. Don't trust any politician or political party: the only thing they really want is to seize power and use it for their own self-interest, to the detriment of people, animals and the environment. If you live in a country that enforces compulsory voting, it might be a better idea to cast a voided ballot anonymously rather than paying a fine (not a blank ballot, which can be trivially tampered with later on in a fraudolent way in favor of your political enemies).
Oppose nationalism in all its forms. Oppose national flags. Oppose laws against flag desecration. Oppose national anthems. Oppose sporting events contested between different national teams (e.g. FIFA World Cup, Olympic Games).
Oppose intellectual property in all its forms (e.g. copyright, trademarks, patents, trade secrets). Buy generic drugs instead of brand-name ones whenever possible.