First Time Build Advice

Hello, everyone. I am new to these parts of the internet, so please go easy on me. I have aspired to build my own machine, one that is capable of running most if not all games on decent to high settings. Ultra would be nice, but I'm trying to be realistic here. I planned on getting parts necessary for 700-800 dollars. I don't know whether or not I will stay under that mark or not which is why I'm looking to this fine community for advice on where I should go next. I might be capable of spending more if I'm properly persuaded, but I would preferably get what is necessary within the price range.The parts I currently have ordered are: MSI N660 TF 2GD5/OC GeForce GTX 660 2GB 192-bit GDDR5 PCI EXpress 3.0x16 HDCP Ready SLI Support (http://www.newegg.com/Product/Product.aspx?Item=N82E16814127699) for $184.99, and a WD Blue 1TB Desktop Hard Drive: 3.5 inch, 7200 RPM, SATA 6 Gb/s, 64 MB cache (http://www.amazon.com/WD-Blue-Desktop-Hard-Drive/dp/B0088PUEPK) for $59.99. The other parts that I am currently keeping an eye on are the AMD FX-6300 processor for $109.99, and the Asus M5A99FX Pro R2.0 mobo for $136.98. I don't exactly know where to go from here. I have tried looking into getting 2x4gb ram sticks, but there are so many different kinds that it's throwing me off. All the "DIMM", "SDRAM", "dual channel", "240 pin" terms etc etc etc are making me second guess what would be compatible for my motherboard. 240 pins are mentioned for the motherboard everywhere except for the actual asus website so I don't know. If anyone could maybe point me to some reliable sticks at a good price, I would be grateful. One person apparently found a couple for 40 dollars which I find ludicrous and too good to be true. I will also want/need a cooler for my processor, since the stock is very loud and simply mediocre from what I've heard. Again, any and all advice is welcome. Heck, I don't even really know what I want as far as cases go haha. I'm not sure what would be big enough and how to effectively use the usb ports given for the case. I'll probably look around for tutorials more, since I'm probably asking for too much as it is for a single thread. I appreciate the help and thanks ahead of time. (long winded plea for help over)