If you are not beating Noble, then you are not developing your economy properly. It is as simple as that. So practice that part of the game. Listen to the words of our salivating Ursine friend. For the purposes of practice, let me add some more advice.
Forget wonders. They are a distraction to your practice.
Forget the religious line. Let the AI found the religions. Adopt whichever one your friends have, or stay out of the religious wars altogether.
Initial tech path should generally be whatever brings food to your neighbourhood, followed by bronze working and a beeline through math to CS. Depending on your situation, you will probably want to slip in one or two techs along the way. Sailing, IW, Calendar and Construction are some possibilities.
Start by training a worker about 90% of the time. The main exceptions is when he will have nothing to do because you don't have the techs yet or when you want a work boat instead. If you do start with a boat, move your citizen to the highest hammer tile you have in order to get it out ASAP.
A good rule of thumb is to let your capital grow to size three (train several warriors for exploration, MP duty and fogbusting) and then train another. Grow more (the exact amount depends on how much food you have) before your first settler.
As soon as you have writing, build (or preferably, chop) a library somewhere and hire two scientists. The GS you generate should usually be burned on an Academy in the capital.
Granaries! Everywhere.
Learn to use the whip. And always whip for at least two pop at a time.
Every city should have at least one food resource (Flood plains count) and try to place them so that they have other resources as well.
Keep working at it until you have at least eight cities at 1AD.