If you want your search to be more specific you can add site:flickr.com site:deviantart.com after your keyword that is to be searched.For example if i want landscape wallpaper only from site flickr and deviantart then i will search for landscape site:flickr.com site:deviantart.com.The result will contain wallpapers from both the site.
That's the one part of the post.But How to Download them fast?
Now here is the method to download images directly from Google Image Search without going to original page:
If you use Firefox, you can install Customize Google extension that, among other feaures, rewrites links to point straight to the images. Or if you have GreaseMonkey installed, you can add the script from here.
For Opera, save the script from UserJS.org to a folder on your computer and make sure you set the option from [Tools/Preferences/ Advanced/Content/ JavaScript options/My JavaScript files] to that folder.
Internet Explorer has a GreaseMonkey clone, called Trixie, that supports most GreaseMonkey scripts, so you can use the script for Firefox.
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