Make Acrobat Reader start up faster

Get Acrobat Reader to open up faster – Go to your Acrobat\Reader folder and take everything from the "plug_ins" folder and move it into "Optional" except the following: Search.api, Search5.api, IA32.api, EWH32.api, EScript.api. Printing and search will still work, and it will load 75% faster.

Cut and pasted from here, which has oodles of handy tips like that.