I use dropbox to sync files to my ipad. It creates a folder on my computer to which I can drag files to. It then uploads them to their server and when I need to access the files I just open my dropbox app on my ipad or iphone and I can download the file wherever I am. I can also have it download and keep the file on my ipad for offline access. I use it for all sorts of documents I need to have with me. Great for traveling. And I love that it acts as a backup for important things in case my computer crashes because anything in the dropbox folder is also online in the cloud. You can password protect the files as well so it is secure.
Use this link for a bonus 500 MB for both of us. The service is free for the first 2 GB (plenty of space), and you can even share your folders with others for quick file transfer.