Can someone please help me upgrade my drivers, or at least find out HOW I should know when new drivers are available?
If the drivers are available in Ubuntu, you can get the latest updates with:
apt-get -u upgrade
or with the update application that shows when updates are available in the task bar.
If your drivers are third party drivers that you download from other websites then ubuntu, you will have to check these websites for updates manually.
But if your drivers work fine, you normally do not need to update them.