Poll CPU, Disk and Memory

I would like to know the opinion of you guys on the use of Threshold, which you guys use?

I'm using this configuration:

**CPU

       Critical: 90 - Rearm: 87 - Con.Times: 3

       Attention: 00 - Rearm: 00 - Con.Times: 0

       Trouble: 80 - Rearm: 77 - Con.Times: 3

**Memory:

      Critical: 90 - Rearm: 87 - Con.Times: 3

      Attention: 00 - Rearm: 00 - Con.Times: 0

      Trouble: 80 - Rearm: 77 - Con.Times: 0

**Hard:

      Critical: 80 - Rearm: 75 - Con.Times: 3

      Attention: 00 - Rearm: 00 - Con.Times: 0

      Trouble: 70 - Rearm: 67 - Con.Times: 0