When I click the text placeholder, all my white text gets highlighted in white and I cannot see anything! What can I do?
In PowerPoint 97/2000: Go to Format | Slide Color Scheme. You’ll find your background color set to white. Change it to something darker (or a non-white color).
In PowerPoint 2002/2003: Go to Format | Slide Design. In the activated Slide Design task pane, click Color Schemes. Then click Edit Color Schemes… and change your background color from white to something darker (or a non-white color).
Echo Swinford has a nice Color Schemes tutorial on her site.
Steve Rindsberg’s PowerPoint FAQ has more info – see Text disappears when I edit it
Shyam Pillai’s free Color Schemes Manager allows you to manage and share your PowerPoint color schemes.