What is the best way to test out websites

[RuchitGarg]

With so many different browsers, OS and devices of various size, i wonder if there are good tools available which can help me simulate top scenarios on a single machine and do testing.

Any suggestions?

[sebphfx]

online there's browserling and browsershots.Also Netrenderer is not bad.These are mostly free. You can install VirtualBox if you're on Linux and want to test for IE and not use Wine.And Microsoft has virtual machines, I forget the name,but you can install different versions of IE on the same machine(here: http://www.microsoft.com/download/en/details.aspx?id=11575). You can also use the Opera mobile emulator to test for different devices.