What is 'best practice' for omitting specific referrers from stats and reports?

I’m looking for ideas or a stradegy to eliminate the IP and/or host name of my home/office router from showing up in certain logs and stats. For a couple of domains it would be nice to see file names and pie charts that are more real. For instance, the Referrer charts in the analog stats and Webalyzer for a Siteworx account is all about my localhost office PC with little slivers representing all other referrers. Percentages would balance out better if only those visitors were counted. What’s the best way to go about this?