Tips to be happier!

I'm generally a happy person but lately I've just felt really stuck in life (ya know) just with my job, uni and my relationships. I need some tips on how to be happier in generally. Every so often I find myself down and give myself the pep talk of be happy and grateful, no one is dying, your healthy and anyone would be lucky to have you etc. and I've recently started going to the gym too aswell more often which is helping but just anymore ideas or words of wisdom would be awesome girls!!