I think life is the mixture of Adjustments & Comfort. Means for the sake of  comfort people tries to find out new things which r not available with them. For aquiring such new things they make exra efforts and may be in future they get it , but i think it is upto individual persona that which new thing u need. Means for example , if i have B&W  T.V. & i like it that means i m comfortable with  it , but if i dont have money to buy colour one & i dont have option to use B&W then that is Adjustment.

The term Happieness depends on the border of Comfort & Adjustment. If the border is wide the happyness is less & vice versa. That means u just try to find comfort in available things, & u will be happy. 

Now, it is person to person varries but this is my opinion , i expect ur replies on it.