PDF Speedup is a freeware program from AcroPDF Systems.
It's a quick download, no install neccessary, and works so well, I'm telling everyone about it. To quote their site, “PDF SpeedUp allows you to significantly speed up the time it takes to load Adobe Reader. If you notice that when the Reader starts it loads many plug-ins which you may or may not need, this program simply disables the plug-ins and loads only the absolute necessary ones so the program starts quickly. It offers several options and you can also manually enable or disable the plug-ins as needed. PDF SpeedUp works with Acrobat versions 3 through 6.xx. Multi-lingual interface.”
Finding great software like this is one of the reasons I love my job as a software reviewer… the cool folks at AcroPDF have also offered a similar program for Adobe Photoshop for free, though I haven't tested it yet. I did have the opportunity to review AcroPDF, a shareware program that can convert your documents into PDF format, with no annoying pop-ups or registration windows. AcroPDF is free for personal and non-commercial use, but you must purchase the product, if you wish to remove the extra line at the bottom of PDF pages. These guys rock! Check them out!