A definitive hierarchy of values and consequent ideal actions?

As long as you've got a hierarchy of circumstances - an 'it would be better if' - then you've got a meaning to your life.

The notion of, 'my birth could have not occurred', puts a red line through any meaning. Does it? No, because now that I'm here (now that I have been born), the 'it would be better if' creates genuine meaning.

But looming above all this is the uncertainty of, 'am I correct in thinking such is better than such'?

Is there a set list of philosophy reading which I could complete, that could give me a definitive hierarchy of values and consequent ideal actions?