Flash can really slow web pages down even worse robots can't read Flash and if your visitors don't have high speed (Most Internet users still use dial up.) Internet it can take forever to load or your visitors may not Flash installed on their computer, like I said before who is going to wait to just see your web page when they can visit someone else's site with almost same information as your sites? Flash really looks great and can really make your site look outstanding, but there are other ways to make your site look great without Flash. If you have to use Flash try to make/get one that loads fast on dial up and don't use a lot of it on your web site.

Java scripts can put a major load on your server and slow it down. Robots can't read Java scripts and robots dislike Java scripts. What makes me mad about some web designers is when they use Java clocks, if visitors need to know what time it is they can look at clock on left side of their computer and even if computer doesn't have one they can look at clock in their house, it's that simple with Java clocks you don't need one on your site!

You should keep your web pages size between 10K and no more than 30K, so both spiders are happy and most important your visitors are happy too.