I've been using Digsby to manage my email and social networking accounts for about half a year now, and it's finally developed to the point where I can recommend it to people.
Digsby integrates Internet Messaging (IM), email accounts and social networking account (mainly Facebook, for us Singaporeans) into one program. So from one program you can sign on to Google Talk and MSN and chat simultaneously, while checking your email and reading your Facebook status feed all at once. It allows you to keep status icons in your taskbar, so at one glance you'll know whether you have new emails (Figure 1). It also notifies you of new events through unobtrusive slide-ups. The InfoBar is also very nifty (Figure 2), I can put off reading and replying to my emails until I have to.
Anyway, I recommend everyone to at least give it a try.