If you can, add more movement to your daily routine. If you have a commute, consider a bike. Can you walk to buy groceries? Use a basket instead of walking a cart? Any other car trips you can replace? Take up dancing, climbing, or some other active hobby.
But if you want a segregated "exercise" time, then I'll second kettle-bells. You can work as hard as you like in very modest space with 2 or three bells.
For 0 gear, look at bodyweight work. The Canadian Airforce produced a program you could do when stationed at an arctic DEW line station with no more space than you had beside your bunk. http://fit450.com/HTML/5BX_Intro.html
But if you want a segregated "exercise" time, then I'll second kettle-bells. You can work as hard as you like in very modest space with 2 or three bells.
For 0 gear, look at bodyweight work. The Canadian Airforce produced a program you could do when stationed at an arctic DEW line station with no more space than you had beside your bunk. http://fit450.com/HTML/5BX_Intro.html