if both computers are connected to the same router/network per wifi, or lan, the easiest method would be setting up a homegroup and share the files you want to transfer with the homegroup. that's quite self explanatory since windows 7, just hit the windows key and type "homegroup" to get started.
more info here: (you need silverlight to view all contents)
http://windows.microsoft.com/en-us/windows/homegroup-help#homegroup-start-to-finish=windows-7&v1h=win8tab1&v2h=win7tab1
that's how i "set up" my two computers to be able to easily share files between them, without having to get my ass up and use a flash drive.
this should also work if you connect both computers to the router via LAN, if possible, which should get you better speeds.
which brings me to the even simpler solution: flash drives and external hard drives. i consider myself quite technophile, but networking has never been something i really got the gist of - until windows sevens homegroup made it so easy even i could get behind it. still, depending on your wifi router, wireless networks can be quite slow. i'm in wireless G here and am happy if i reach over 1MB/s with my crappy router.
so if you really don't want to mess with networks and potentially slow transfer speeds, just get yourself a big flash drive, or even better, an external hard disk and use that as intermediary storage.
an external hard disk would also be a great choice because it can be used for backups, which is something most average users don't think about too often.
cheers