Still very much a CIV newby but I pulled a Space Race Victory in my 2nd Prince game. I actually won the game on the very last turn, I had kept a couple of forest around my 2nd city to help rush production of something important and it was just enough!! I beat Khan who had a large point lead on me. I had attacked Asoka to take his 4 good cities, when through I basically put my economy into total Research and Spaceship production to outpace Khan, I knew I could not beat his points and wasn't sure if I could beat him to Space. I would not have won this 2nd Prince game without all the comments/suggestions here. So thanks to all! 
I hate losing to Space Race, and I really don't like winning Space Race. Not sure why.
Couple of observations. I have been beaten by Cyrus A LOT!! He always does well. I've come to the conclusion the only way to win if Cyrus is in the game is to attack him ASAP.
I still don't feel I understand city specialization and specialist economy. I do understand having a couple of power cities, in particular strong in culture and science (wonders and GP's). I know I have not yet grasped the balance between city growth and production/currency.
I think I've learned to be more selective about taking Cities, and not to waste turns/resources to wipe out another Civ since there is no benefit to destroying a Civ (was there a benefit in older Civ games for doing this?).
Oh, and I think I have found my favorite Unit... the Russian Cossack!!! Those guys kick some serious tail!!

I hate losing to Space Race, and I really don't like winning Space Race. Not sure why.
Couple of observations. I have been beaten by Cyrus A LOT!! He always does well. I've come to the conclusion the only way to win if Cyrus is in the game is to attack him ASAP.
I still don't feel I understand city specialization and specialist economy. I do understand having a couple of power cities, in particular strong in culture and science (wonders and GP's). I know I have not yet grasped the balance between city growth and production/currency.
I think I've learned to be more selective about taking Cities, and not to waste turns/resources to wipe out another Civ since there is no benefit to destroying a Civ (was there a benefit in older Civ games for doing this?).
Oh, and I think I have found my favorite Unit... the Russian Cossack!!! Those guys kick some serious tail!!
