Considerations in making Flash Web Sites

I’ve recently planned a storyboard which includes the design and interactions etc of my website. I think I’ve learned a good deal about Flash in the last few months, and this is going to be my first attempt at making a simple, fast, hopefully professional, Flash portfolio site. Probably should have learned Flash much earlier, but I’ve always been mired in the realm of Raster.

Since you Kirupians probably do this daily, I’m asking for your advice before I get stuck into this proper. What are some things I should avoid, what are some things I should definitely add. Someone mentioned before it’s good to have preloaders that occur for each dynamically loaded SWF, but what else do you believe is important?

Thank you for any advice you can give.