Great person farms work best with Caste System as you can then run lots of scientists which pop Great Scientists and you can use them to bulb techs which gives you an edge in the early game but is pretty useless in the late game when the cost of techs is so much higher.
Find a piece of land with good food and lots of hills and only build farms and mines, thats your production city, any Wonder you absolutely must have goes there. Often in your Production City it is good to build Heroic Epic once you get a lvl 4 unit (100% faster military production), and when ever your not building anything special just pump out units, one after another after another. Destroy old units after a war or upgrade those with good promotions, as the more untis you have the more it costs you. Something to look out for is City Raider promotions, Macemen are the last unit that can have this promotion, if your going for a Domination or Diplomacy win, it is a good idea to get an early war in to upgrade a bunch of units with City Raider for use when you have Rifles or something similar.
Another way to get a bit of a tech bonus is pick on the weakest Civ early before they get Vassalised, then you can either make them your Vassal or force them to give you techs for a Peace Treaty.
Cottage spam alot. If your going for a culture win you can have a Production city and turn it into a cottage city towards the end game so you can benefit from the culture slider, this also helps snag wonders (don't put anything into culture slider until your absolutely ready to sprint for the end). The thing you need to produce wonders is a tech lead, often going for Pottery first and building a few farms helps lots, as you bulb techs with scientist that helps and you can trade to back fill, this means you need Library early on and that creates a conflict on interest between Mining -> Bronze Working (to chop out settlers and Great Wall/Pyramids from Masonry) and the Religous Techs (Stonehenge, a must if your not Creative). Bulbing techs works best if your Philisophical.
A little trick I learnt recently is the AI will often pay lot for resources, if you sell 3 or 4 resources you can easily net 30 gold a turn, which can result in 10% higher research. Don't expand to fast, as although more cities means more research, alot of your cities will be crap, if you have 10 cities and only 4 of them are any good, you'll produce less research on 40% than 6 cities with 2 crap at 70%.
Wonders are great but I think as the games gets harder building wonders becomes less important. Some are better than others, Stonehenge, Pyramids, and Great Wall are all pretty rocking as is Oracle and Parthenon. I have read Statue of Zeus is OP but don't think I have managed to build it, some others are also good. If you do have a tech lead then go Democracy after Liberalism (free tech slingshot), if your first to switch to Emancipation then you force unhappiness on all AI civs, you can either use this to hamstring them or to backfill your techs as they will all want it.
TBH, there is so much to know it's almost silly. I got beat about 8 times on the trot at Prince before winning my first game and I am not 100% still.
Shitty about work mate, hope it calms down. I think you'll find FFh2 pretty odd to start with, the tech speed and building speed is slower and there are alot of barbs but GL

Sax.