Time is the limiting factor as I am building my application and working full time. Every morning, I run 1 mile and do 25 pushups. Starting next week I'll repeat that in the evening. I make sure to stretch and do some of the katas I can still remember.
I monitor my basic nutrition intake. The only thing that is important to remember is that 3200 calories = 1 pound of fat. Eat 3200 more than you burn, gain a pound. 3200 less? Lose a pound. Muscles are formed by destroyed strands of muscle fiber and letting them be rebuilt (during recovery) with protein. So, I calculate my basic needs (~2800 calories, 60g protein, 15g fiber) and try to stay within that area.
As long as you maintain these parameters, you will stay in good condition. If your life is stable, you can of course do all sorts of other interesting things - but if you are time crunched like me, this is enough.
I monitor my basic nutrition intake. The only thing that is important to remember is that 3200 calories = 1 pound of fat. Eat 3200 more than you burn, gain a pound. 3200 less? Lose a pound. Muscles are formed by destroyed strands of muscle fiber and letting them be rebuilt (during recovery) with protein. So, I calculate my basic needs (~2800 calories, 60g protein, 15g fiber) and try to stay within that area.
As long as you maintain these parameters, you will stay in good condition. If your life is stable, you can of course do all sorts of other interesting things - but if you are time crunched like me, this is enough.