Super excited for D3 and extremely bored at the moment so I want to share with you what I did to prepare my rig before launch. (For windows 7)
Add others if you know any :D
1. System Sweep
A computer at full capacity will slow down system performance due to all the clutter on the HD. So as the title suggest's take a sweep of your system and uninstall/delete unnecessary files. If your not sure, leave it alone
2. System Settings
You can sacrifice Windows appearance for Performance.
Start>Control Panel>System and Security>advanced settings>Performance Settings.
Choose "Adjust for best performance" or you can play around with the custom settings.
3. Clear temporary/unwanted files
Erase all unwanted files. I would recommend CCleaner - This will erase all unwanted/temporary/hidden files/cookies. It will also take out the trash for you!!! (empty recycle bin)
4. System Defrag
Fragmented files can slow up you're HD. There is a simple, easy way to make sure your HD is nice and tidy with a system defrag. Make sure to do this last.
Search "Disk Defragmenter" in windows start bar.
Soo yeah...A quick system overhaul. she'll be running like a peach mate.