Everyday we are alive, we win the lottery of life. We could've died in the womb, at any stage in development. We can drop dead any second.
When you simplify it to that extent, most things that we complain about, become meaningless.
Master the arts of patience, kindness, and integrity.
You will feel a peace and contentment, that you never knew existed. Certainly nothing that money or material things can provide, long-term.
I think I've stated this before, but I am the most fulfilled now, with the least amount of material possessions.
Happiness can only start from within, and then can be extended outward, towards others.