The biggest barrier to positive change at any level—individual, team, society—is identity conflict. Good habits can make rational sense, but if they conflict with your identity, you will fail to put them into action.

The most effective way to change your habits is to focus not on what you want to achieve, but on who you wish to become. Your identity emerges out of your habits. Every action is a vote for the type of person you wish to become.

Small habits can make a meaningful difference by providing evidence of a new identity.