How can I update my ADT in Eclipse?

Question

I have tried to update my Eclipse. Currently I have till 2.2 Android SDK in my Eclipse. Yesterday I have updated my Eclipse like this:

Eclipse -> window -> Android S

Answer 1

In my case opening 'Help' >> "Install New Software" had no entries for any URLs (previous url's were not there) - so I Manually added 'em. And updated ... and Voilaaaa !! Above posts have been very helpful in resolving this issue for me.