I have found this is the best technique for seeing using your screen and dock features. Here is the way I do it.
1. Download and install Quicksilver from
http://www.blacktree.com/ This application will change the way you use your Mac for life. I could not go back to not using my Mac without this App. Oh Ya, change the look to Bezel in the Appearance of Quicksilver prefs, it looks better.
2. Once you have that installed and running, it is time to move to your dock. In the Dock put the Applications that you use the most and are the most important. I like seeing those apps while I am working in my dock.
3. Buy this trackball from logitech
http://www.logitech.com/index.cfm/mice_pointers/trackballs/devices/156&cl=us,en You can pick it up at most any retailer, Best Buy, Radio Shack, ect... This trackball is awesome because it has four buttons and only cost 20 bucks. Once you use a trackball you will never and I mean never go back to a mouse, trust me

This trackball comes with software so you can add key commands to some of the buttons. This will come in handy in a little while.
4. Next, Download and install this piece of software it is free and here is the site
http://www.app4mac.com/action_view_freeware.lasso?-token=($Var_sess_productfree)&-session=WEBS:4758F1DB07d6c29E5Ekhu12C7DF0
In the controls you can set a keyboard shortcut to activate it. Before you do this. Go to the system folder. You would have installed the logitech software that came with your trackball. Turn spaces off. Now, in the logitech Prefs Pane set one of the buttons to one of your spaces keyboard shortcut. Set what you want Rapido Start to be on the other. Then go activate spaces and set it to that key command. Then go to the application Rapido Start and set the key shortcut to the one you set on the other logitech button. Oh ya, the prefs for this application are on the right corner of the pop up window.
Your done, now you can access Rapido Start and Spaces from clicking buttons on your trackball. One last thing, with Rapido Start activated Drag all your applications into the Rapido Start window. Now you can see all your applications when you need to with a click of your mouse button. All the ones you always use will be in your dock.
Works like a charm!
Leave me some feedback and tell me what you think?