The key to getting the biggest bang for your buck in your wellness program is to focus on a few tried and tested offerings that studies have found result in better health for employees and reductions in your overall health care insurance costs. If you use a scattershot approach, the returns may not be as great, and the cost of a wellness program correlates directly with the width and scope of services offered. The following are the top wellness offerings by participation rate, according to a study by the International Foundation of Employee Benefit Plans: Flu shot programs, 50%,Health screenings,…