I came across these old videos from Google as part of our training for new employees and forgot how good they were. If you have not seen them they are a must watch. They put into perspective how the challenges faced in using many websites would be comical in the real world.
It's often a great idea to review your site with a fresh pair of eyes. When you have not looked at it for a while some obvious improvements may jump out at you.
With your contact & sign up forms do you really need all the fields? The fewer the you have the higher the % of people will complete it. Obviously it is a fine balance to get enough information without putting people off. Is it clear what someone will get when filling out a form. If not they may not fill it out !
Time to start improving your conversion rates!