!) You should always have a layout, It keeps thing organized and in place.
!) Have a lot of stuff to do on your site, or it will get boreing for the visitor and then they will want to leave and probley wont come back.
!) So should always have a font color that shows up good like if you use yellow on white, Well that just dosen't work.
!) Never copy because if that person you copyed off of happen to find out, it's not pretty.
!) Be original try diffrent things, some people may not like it but tuff-luck what i'm trying to say is, if people say mean thing like I don't like your site, don't go doing the same to them be the bigger person
!) Make sure everything matches becuse other wise it just looks sloppy and un-professional.