This is an interesting question. Because of the virus scares you really want to be careful when going to websites. This is especially true when you see links on a strange web site. Even links in emails can be dangerous.
First hover over it. Remember the link you see is not necessarily the address. The first think to look for is the actual domain portion. If the display name says it is a link to a known domain like google.com but when you hover over it, it says the domain is badnewsandvirus.com you know this might be a problem. Don't click on the link.
After the domain name portion the rest of the actual link is probably irrelevant. But make sure the domain portion is something expected.
Use a Link Scanner
Check Out Shortened Links