Incorporation of flat design isn’t tough; just keep in mind the basics.
Baronfig.com shows how flat design can be stupidly simple.
Keep it simple, silly!
Matt stickers section of Discountstickerprinting.co.uk is an extreme example of minimalist flat design.
Minimalism is the key to success.
Isoflow.co.za shows its depth and grandeur of flat design in a whole new way.
Depth doesn’t do
Myclique.is shows how cool candy colour can be used to make the design look awesome.