I think the best time for going to bed is 11 P.M. & should wake up between 6 to 7 A.M. In this you will have a better schedule and better diet for your body.
I think you should do full body workout once in a week and you can continue it for as long as you wish. It will effect your at fast rate and it should be done by everyone who started their bodybuilding program.
I think workout at gym is rather best option then working out at home. Although you can workout at home but sometime you feel bore because of limitation of equipments and different exercise. In a gym you never feel this kind of situation because lots of equipments are there and you can do any...
well, if you talk about my routine then I always focus on bench press. I always like to do heavy bench press. I think to increase your power you should do heavy weight with lower reps then you will be able to pick up more and more weight.
If you want to do exercise for only 3 days in a week then you should choose Tuesday, Thursday, and Saturday for workout. Go for a walk, do few pushups and try to use low weights equipments of body building. This will help you in maintaining your fitness.