Happiness for me is the little things in life, like when my mom smiles, my dad's hugs, my fiancee holds my hand and tells me everything is going to be fine, my dogs jumping on me and licking me when I come home from work, my cup of coffee. These things are what makes me happy.
But we should not look for happiness outside, we should should be happy from within and all these other things just adds to your joy.
I also feel material things can never bring any joy only people who genuinely love you can give you real joy. One more thing that can make you happy is to help people if it's in your capacity to do so, it can bring immense pleasure.