Excluding Internal Traffic from Google Analytics is a MUST.  Not accounting for a companies internal traffic helps you make better decisions on AdWords or any other PPC marketing as well as keeping tabs on Top Content as well. This is the easiest way to block internal traffic.
Below I will give you a step by step guide on Excluding Internal Traffic from Google Analytics.

1. In Google Analytics, create a new filter. In this example I will title “Internal”

Filter Type is: Custom

Select the “Exclude” Option

Filter Field: Campaign Source

Filter Patter: internal

Select the website profiles you wish to add this filter to, Click Add:

Then Save Changes:
2. Go to: Google URL Builder

For the website URL, just put in your website’s domain (i.e. http://www.mywebsite.com)

For campaign source, medium, and name, enter in the word “internal”.

Click: Generate URL

3. Copy and paste it to an email, and send it to everyone in the company or anyone you want to exclude. This is per browser. So if you use multiple browsers just click it in the browsers you want to block. I suggest bookmarking it as your link to your company site!

Manually Tagging your links in other search engines (besides AdWords) and other marketing campaigns such as Banner Ad’s, Text Link Ad’s, and Video ad’s is a MUST!

Unfortunately Google Analytics doesn’t always pick up the right Campaign source, medium and keyword that generated the hit to your site. The best tool to create URL’s that will be easy to track in Google Analytics is the Google URL Builder. This tool makes Manually tagging URL’s very easy for tracking. Enter the Destination URL, The Source (Like Yahoo, MSN, etc.), The Medium (Like PPC, Banner Ad, Text Ad, Email), and Campaign Name (Like Product #, Model #, SKU, etc.) and Click “Generate URL”. And You’re Done! Just Copy the URL that is generated and paste into the Destination URL field at Yahoo PPC, or MSN PPC, or what ever provider for advertising you are using. 

This is very simple, Very effective for making sure all your tracking is showing up properly in your Google Analytics reports!