Ever get a rush of happiness when spending money only to crash later? Our spending habits – particularly balancing our 'needs' with our 'wants' – affect our mental health and happiness. So, next time you have the urge to splurge, Dee Marques suggests you stop and think first...   New research shows how we are saving and spending money affects our mental health more dramatically than previously thought. And learning to embrace our emotional responses to spending may provide the key to