If you're thinking about what your New Year's resolution for 2019 should be, a new study suggests you might not even want to bother to commit to one, finding that most people give up on their resolutions by January 12th. Strava, a social network for athletes, analyzed more than 31.5 million online global activities last January, and was able to pinpoint the date when most people said they hadn't been able to stick to their resolutions. Unrealistic expectations are a big reason for resolutions failing, and there is some expert advice on how to avoid that happening. Nutritionist and lecturer Dr. Carly Moores of Australia's Flinders University said you shouldn't try to make too many changes at once, suggesting, "Start with small changes and continue to build on these or try to tackle one change at a time." Dr. Marcelo Campos of Harvard Medical School advises that writing your goals down can help you reach them because it feels like more of a commitment. He wrote in a blog post that there are five questions that can help you stick to your resolution: Why do you want to make the change?; Is your goal concrete and measurable?; What is your plan?; Who can support you as you work toward change?; and How will you celebrate your victories? He also reminds: "January 1st is just a day in the calendar. You can reset your calendar every day for a fresh start."