Gmail can download messages from up to five other email accounts, centralizing all your email in Gmail. This feature can be enabled to access third party email accounts (hotmail, your ISP email, etc.) alongside your Gmail account and can even be used to display certain sections or labels within your Gmail account simultaneously, e.g. by creating a search filter for a labeled or starred email.
Though at first glance this may seem daunting, it’s not that bad to configure and will give you the advantage of never ever having to check 2+ separate email accounts again.
Here are links to some basic instructions on how to do this: