What kind of working out do you do? How old are you? You don't want to work out so much you cause damage. You don't want to run before bed because it stimulates the system and makes it hard to get good sleep. Running eventually will damage you, so you have to decide, are you an athlete and love your exercise enough to possibly stress your body, or are you just someone who exercises for health? A lot goes into exercising, as you can see, and it differs by the person. If you're weight lifting, most would recommend alternating parts of the body so you don't overstress yourself. Aerobics can be done daily if you don't overdo it. A day off or two every week can help your body keep from becoming abused and having injuries later in life. A lot goes into this question.
It completely depends on your body, schedule, and habits. The key to gaining results is actually just sticking to your exercise. If all you care about is losing weight then running should be your main priority. I hate running, as do most people, but it is worth it. If you can, pick an alright time of day, I usually run before bed or when I am at the gym. You pick a reasonable distance, and run it as much as you can, with walks in between. Eventually you will notice you can run the entire distance, and you may add laps. Try to do this every day, but you may need to add breaks in between. Always focus on pushing your limits. Crunches until muscle failure (raise up just enough to get your shoulder blades off the floor), pushups and jumping jacks are also good for when you have a free moment to spare. Try to think of food in terms of the ratio fat, sugar, and salt to vitamins, proteins, and other healthy benefits. Eat when you are hungry, but try to aim for better food ratios. Good luck!