I need tips on writing a good article. How long should that article be? How do you rate an article as good or bad or...
I'm fairly new to hubpages, so I can only relate to you what my experience has been. For me personally, I tend to like hubs that are informative, amusing, and are not so long that I don't bother reading to the end. I've written a couple of recipes, and mostly, I write from my heart. I did write a 4-part hub that didn't get as much traffic as I had hoped. My thought on that one was, if I kept it all in one hub, it would be way too long.
Take your time and view other hubs, I'm sure some of them will inspire you to write about something you can relate to. I've also noticed that good hubs are on topics that aren't too common, which is not to say 'common' topics don't work, they certainly do.
Most importantly, enjoy hubpages, have fun, you will meet the most amazing people :)