I'm thinking about building a really good gaming laptop, what do I need?

Like, one that can run Skyrim and Minecraft without ANY lag whatsoever. Just one problem, what exactly do I need. I'm also trying to save A LOT of money. So what things do I need. (I'm also trying to make this PC Windows 8)

Simply get the Recommended (or Optimal) specs of the games you intend to play and then do a search for the hardware that exceeds those specs:
Example… Skyrim wants:
-Windows 7/Vista/XP PC (32 or 64 bit)
-Quad-core Intel or AMD CPU processor
-4GB System RAM
-6GB free HDD (Hard disk drive) space
-DirectX 9.0c compatible NVIDIA or AMD ATI video card with 1GB of RAM: Nvidia GeForce GTX 260 or higher; ATI Radeon HD 4890 or higher
-DirectX compatible sound card
-Internet access for Steam activation

Windows 8 is not known for being kind to older games.

I don't know of anyone that has built their own laptop but to build a gaming laptop you will need lots and lots of money and a lot of knowledge about computers you would be better off building a pc or buying a pre built laptop.