Improving disk performance

I am having a 160GB Hard disk in my desktop pc running with Windows Vista Home. There is just 2 partitions on the HDD, that is ‘C’ for operating system with 60GB and ‘D’ for games data with 100GB. Since last couple of months I noticed that disk activity is slowing down my user applications. Also my games started slowing down. Is there any way I can increase the disk performance as it was before ?

10 Ways To Improve Performance in Windows Vista:

• Remove Unused Fonts
• Defragment you Hard Disk on Boot
• Speedup Folder Browsing
• Defragment Your Hard Disk
• Optimize Your Pagefile.sys
• Disable Indexing Services
• Use a Flash Memory to Boost Performance
• Disable Performance Counters
• Optimize Display Settings
• Detect and Repair Disk Errors.