Need to share files between your home PC and your laptop? There are plenty of ways to do it, but two of the easiest are Dropbox and Cubby (Google Drive is very similar). Both sync files between your PCs and their cloud storage (up to 5GB is free, more if you’re willing to pay). Cubby is new, and still invitation only (you can sign up on their site to get an invitation someday, or ask me for one today); Cubby does have an additional feature that Dropbox doesn’t have: while you can sync 5GB of data by going through their cloud storage, you can also sync unlimited data directly between your own PCs.
(Full disclosure: that Dropbox link is a referral link, if you click it we both get more free space; and if you ask me for a Cubby invitation that will get me more free space too.)
Update: Cubby closed down in 2016.