Have you duders heard of www.desktoppr.co? It's this cool site where you can find plenty of HD wallpapers. If you create a account, you can then sync your dropbox. So how I have it is my dropbox account is linked to my account. Then I could browse the wallpapers, once I see one I like, I can click a cloud icon on the side of the image. This will automatically upload it to my dropbox. Then on my computer I have it so that my wallpapers cycle through the wallpapers in a folder, in my dropbox. So what I like doing is when I'm away and bored for whatever reason, I could go to desktoppr and browse wallpapers. Any wallpaper I like I can have it uploaded to my dropbox. So when I get home it the wallpaper will already be in the cycle of wallpapers.
So I just decided to share this and to see if anyone else does this or something similar.
Edit: You will need a beta code to join. TWITTER01 should work! :D