I don't think I have a problem with using clichés in my own writing, mostly because such phrases as "easy as pie" don't usually fit within the context of my fantasy world. Perhaps in dialog, where really anything goes (with exceptions, of course), but not in the text in general.
Despite the need to avoid clichés, the author of the post suggests letting "the clichés come", at least at first. Trying to avoid them is a potential roadblock, and you don't want any impediments keeping you from making progress.
However, once you've got that first draft completed, "equip yourself with the right armory, and snipe at them clichés one by one!" I'm not sure what "snipe at them" means, but I get the gist of it: get rid of them!
Why Cutting Clichés From Your Copy is as Easy as Pie | Copyblogger