Initiatives by employers to drive up savings and enrollment in their retirement plans over the past decade have generally followed the same three-pronged approach — participate, save, diversify.

New Year’s resolutions aren’t just for dieters and exercisers. The start of a new year is an ideal time for retirement plan sponsor to assess the effectiveness of their plan. Virtually all plan sponsors have areas that are ripe for improvement. Here are five resolutions to make and keep in 2015 to ensure you have a smoothly-running, cost-effective plan than succeeds at preparing employees for retirement.