Submitted last week, but haven't had time to write anything up until now.
The first thing I did when I saw that it was a diety game was play a few practice games because I'd never played a diety level game before. My goal was just to get a feel for how the initial build should go. I used the same settings as the GOTM (basically everything random). The biggest problem I had was with barbarians, so I was happy to not see any of them in this game. This helped a great deal. Not enough to actually win, but enough to make me think I had a shot... for a while.
I settled in the start position and started building a scout for exploration. Sent the first one south, then east and met Russia, Germany and Persia. The next scout went south then west, and eventually met Rome. At that point I traded contacts for techs and money. I probably should have waited with this because I certainly could have gotten more if more was available. I didn't want to risk losing the opportunity, though. I got enough cash to buy the next 2-3 techs, but at that point I think I should have put a little more into research, because I just couldn't keep up enough to buy them.
While this was happening I was expanding, slowly but steadily. I grabbed the horses and then settled the northern peninsula and part of the desert to the east when disaster struck. I was sending a settler to build a city on the choke point to the south when Russia landed a settler and took it. All of a sudden my expansion options were severely limited. It's at this point that I believe my game was lost. I built a galley and started ferrying settlers to the lands towards the west, but that was very slow and I only got 5 cities before all that space was gobbled up. There was still space on the continent to the south, but I had no way to get a settler there.
At that point I thought my only chance was through military action, so I built about 20-25 mounted warriors and went after Russia around 50AD. Persia joined Russia and I convinced Germany to join me. Russias two nearest cities to the east fell to my MWs as well as the city on the chokepoint, but in another (probable) mistake, I razed that city thinking I could put my own there, but their cultural boundary still controlled it so that plan backfired. At that point their conter-attack was getting near, so I sued for peace and managed to get 100 gold from them. However, I had forgotten about Persia...
Many turns later, Persian troops began trickling in. I defended the first couple of waves, but then they began pouring with Riflemen. I lost the two cities in the land I had taken from the Russians, abandoned my horse city (this turned out to be a good move) and lost another city before I was able to buy peace from the Persians. I was able to re-found my horse city but at this point I knew that my military options were gone.
I pretty much just existed from then on. I started building up my western cities and planned on trying to gain some ground culturally from Rome, who was the only Civ I was culturally superior to. However, in 1100 AD, Russia decides she wants retribution and declares war on me, getting Persia to join. I desperately try to get someone to help defend me but no one wants any part of it. I pull some troops back in an attempt to buy time, but Russian and Persian troops roll over my cities. In 1150AD Japan and Germany decide to get in on the action, and in 1170AD England joins just in time to watch me suffer a humiliating defeat.
Even though I didn't win, this was probably the most fun game I've had. It was always a challenge, and I survived longer than I thought I would, and even believed I had a chance for a little while. I did some things right, but too many things wrong, and it seems like any mistake on Diety can kill you.