"Thanks guys! I think its also very important to feel happy and stay positive. You can't come home tired after a hard day's work and then study for GMAT. Do you work, but also talk to people....find time to do those one or two things that make you happy - listen to music/ talk to an old friend and generally be happy and positive"
I totally agree, especially with coming home from a long day at the office and trying to study. I have a 7 month old so I only study after he goes to sleep which means it's around 9pm when I start. Needless to say, I have to fight to do the quant problems and find myself irritated and sleepy and less motivated.
Moral of the story? Study in the morning/afternoon hours if you can while you have plenty of mental energy!