i see that in your thread title you ask about high scores. civ4 has a strange scoring system, a major factor is based on how many turns are left in the game. part of it is how much land you have, your population compared to the total population possible on the map if all existing tiles had no improvements (yes i'm serious, it gets very detailed!), how many wonders you built, etc. usually, if you can finish the game earlier, you'll get a higher score for doing that.
my feeling is, score doesn't matter. i play for fun and have my own "this game made me proud" points and "i killed monty so i earned bonus evil laughs" list in my head. some of the games that were most challenging to me, so i felt the most pride in winning them, are actually my lowest official scores, since they were one-city-challenge games. OCCs take a long time, and your population is low by definition, so your score isn't going to be high
from your post itself it doesn't seem like you're that worried about score but i just wanted to warn you about how bizarre the formula is. this is what i do, i worry that people will get discouraged, i get it from my mom.
organized is a trait that gets better at the higher difficulty levels IMO. spiritual i had to learn how to use effectively but it's quite nifty if you do leverage it to get the most out of civic/religion changes. they all have good and bad points. best way to learn is to try them all eventually. and then to try them all again as you get better

. that's what i had to do anyway. some that did me no good when i was starting out, are very useful now that i know a bit more about what i'm doing.