XAP File Optimization Techniques for 2011

So you've created something cool in Silverlight but your XAP file is bigger than you would've hoped. What can you do about it?Well there are tips to be found on the internet. Some say that recompressing the XAP file with something like WinRAR on its "best" compression setting will help. But that was in the Visual Studio 2008 / Silverlight 2 days. Now if you're building a Silverlight 4 app in