Don't be shy, but don't be rude either. Not all users always understand how the system works here, so it's always an encouragement to approach with a gentle reminder to
Please click the checkmark below the voting arrows on the "most correct answer" if one or more solves the problem at hand. This lets others know that you have found your solution, so they won't keep trying to solve an already solved problem. It also let's future users (who may find this same question through Google or Bing, etc) to know what the solution was and move on more quickly with their day, instead of having to troubleshoot each given answer. In addition to checking off accepts, we also encourage upvoting for helpful answers. Thanks again! See the [FAQ#howtoask] for more.
Or something to that effect.