Favoritism can have a negative effect on the workforce. Therefore, away with it. Accountability is a good thing. Good and careful planning is beneficial.
Distribute the workload properly. Keep everybody working and at the same time allow some time to relax and have fun. Although by being meticulous gives you a lot to think about, it does produce some pretty good results. One of them is less-stress.
Above all, I've learned to turn my mobile phone off over the weekends and when on vacation.