You're focused on the 'shoulds' instead of the 'wants'

"I should exercise more for my heart health." "I should watch less TV and be social instead." These big ideas might drive you to start changing. But studies show that knowing why we should make a change usually won't keep us going with new habits long term.

Usually, our brains respond to the here and now. Research shows we need positive reinforcement to set habits — and we need it often.

Try this: Tie your new habit to something positive in your everyday life. Trying to set a gym habit? Find the positives: How exercise brings your stress level down. The extra energy you have throughout the week. An exercise buddy whose company you love.

Focus on the positive things you get every time you make a healthy choice. They're a key ingredient to long-term change.