OK - here goes from memory, as this is at work, on my lunch break (not at home with notes).
Looking at the starting location, I saw no real reason to move. The location gave a couple of resources, fresh water, and hills for defence against early barbs & aggressive AI.
Started scouting, with the first build being a worker. First research was animal husbandry, to make use of the cows. Agriculture was next.
Research Priorities
By this stage, it was clear that 1.) we were going to be hemmed-in & 2.) that our nearest neighbours had resources, units and size. Therefore, numbers of cities in the early game would be limited, unless I could capture some. I wasn't keen on an axeman or archer rush against immortals or war-chariots, so I decided on initially going for early growth. Next research was therefore the wheel, followed by pottery. My aim was to keep our neighbours happy, looking to trade for resources, or perhaps find iron for a maceman attack. I was therefore fairly keen to get to writing & alphabet to start trading for improved relations. Bad relations against aggressive AIs would be rather bad! This was my development plan, although to keep the workers busy, I did make the odd sidetrack - mining to get more shields in the capital, and fishing to grab the seafood. I also figured that I better get archery, to make sure that I had some semblance of a defence, and it was at this time that the oracle was completed (1090 BC). At this point, I sort-of flip-flopped. Alphabet was expense, so I figured I better go for an academy in Bibracte to help it, and better check-out the metal resources. I also entertained ideas of rushing to feudalism for more protection, so researched meditation, priesthood, bronze working & iron working, getting an academy whilst researching iron working, and then alphabet. I then started trading, and picked-up sailing, masonry & mathematics. I then bee-lined to feudalism in order to get longbows for defence.
Relations
I made a conscious effort that becuase I was weak, I needed to keep people happy. For this reason, I purposefully ignored any religions - keeping no state religion at all times (although at one stage my nearest neighbours were all hindu, they were choping & changing a lot!)
Expansion.
Expansion was fairly slow, and I was not aggressive enough in grabbing land, although maybe that was a blessing in disguise in that it made less to defend, and kept the neighbours a bit happier.
I managed to get Vien settled in 2260 BC, Tolosa in 1690 BC, and then didn't get georgovia until 130 BC.
By this point, I saw that there was no copper (Cyrus had grabbed that), no horses (the barbs had those; later grabbed by Hannibal). The Georgovia settler was actually going to try and grab the iron, but hannibal(!) got there too quick for that as well.

So I had only 4 cities.
Mistakes:
1.) Should have tried to get more cities. Being more aggressive, or at least planning for the cities to be closer could have given me more production centres, allowed better land utilisation, and ultimately made it easier to build (say) the globe theatre, wall street & oxford. To be honest, I think it would have allowed me to grab some resources (eg. Iron + horses) early-on.
2.) Research - I should not have been distracted by the likes of meditation, priesthood & bronze-working on the way to alphabet. SHould have bee-lined for that, and then traded. WOuld have saved me a number of turns.
3.) Should have tried for a culture squeeze to get resources. Caste-System to generate an artist would have probably been effective.
The good
Keeping the other civs happy. I actually had Cyrus, Ramesses and Hannibal "pleased" quite early in the game, IIRC, and I think (god forbid!) even Isabella was pleased later on.
Trading - worked quite well. For the life of me, I couldn't get anyone to hand-over any strategic resources, unfortunately, but with constant tech trading, I was able to maintain 90-100% research, and stay-up in the tech race.