Performance monitoring on Server 2000 - Best practices

[Skillz'n Magic]

I'm looking to monitor general performance on a Server 2000 box we have. Users complain that some services are "slow". Well, that's a broad statement!

I want to see where the potential bottleneck is. I'm familiar with how to monitor RAM usage through task manager (Physical memory should be > Peak Commit Charge), and obviously real time CPU monitoring. But I want to monitor things in more detail. I know how to setup counters in Performance Monitoring, but I want some recommendations in picking the correct ones.

Areas of interest are:
CPU usage
RAM usage
Disk activity
Network activity

I'm looking for someone with experience to give me some direction.

Thanks!