This tip is from DWTIPS - it's a good one. To reduce the time it takes to load a PDF you can disable some of the plug-ins that load everytime Acrobat is started up. Here's how you do it:

To disable unneeded plugins and make them optional instead, follow these instructions:

1. Install the latest version of Adobe Acrobat - you can get it here
2. Browse to the plugins folder: C:\Program Files\Adobe\Acrobat 7.0\Reader\plug_ins
3. Create a new folder named Optional
4. Move all files from the plug_ins folder to Optional, except EWH32.api, print*.api, and Search*.api