Employees who become engaged often become distracted at work, using too much time to e-mail caterers, scan bride Web sites and do other planning, according to a Bureau of National Affairs report. Female fiancées are the biggest culprit. Excited co-workers can also become sidetracked. How to handle this? Forbidding any wedding planning is probably unrealistic and not good for morale. But don't tolerate a performance drop-off. Just make clear right away that the employee is expected to keep up her workload. Good employees will compensate by staying late, etc. Bad employees will take advantage.