First of all, life is terrible and horrible and one really needs a good reason to stay around. If you start counting, you have more bad memories than good ones, and funny enough, you remember the horrifying moments more easily then the joyous ones. Rationally, it is not worth living, why to suffer when you could not?
This is why you need meaning, you need to find something that will give value to your pain and convince you to stay around a little while. In this case, nihilism does not help, but values do.
Having a strong moral code may help you survive. Respecting it will guarantee your victory. Until now society and religion would give us these instructions to live by, but, as you may have observed lately, those seem to not fit the new condition of the modern men. It became our duty to invent not only the rules we oblige ourselves to live by, to determine the border between good and bad, between chaos and order but now we are free to choose the burden we want to carry, and it is stressfull. Freedom scares us, responsibility is frightening.
There was this saying that the 21st century is going to be a spiritual one or it will not be at all (it may not sound exactly like this but you get the idea). We are more powerful than we ever have been, we have the power of gods but we feel empty, and lost. This is dangerous, like a ticking bomb. Each individual has the responsibility to assume a value code and live by it in order for us to thrive as a society.
You can decide whatever “rules” you want but one must be on the top of your list “never provoke pain on purpose”, the last century was bloody enough, we don’t need an after party.