Clearing your browser cache can be a different depending on the browser you are using.

Internet Explorer 8

1. Tools 
2. Delete Browsing History
3. Select what you wish to delete.
4. Select Delete

A shortcut to this menu is Ctrl + Shift + Delete

Internet Explorer 7

1. Open IE 7 and click the Tools menu. Click the Delete Browsing History link at the top.
2. Under the Temporary Internet Files heading, click Delete files...
3. Click Yes when you see the prompt asking if you are sure you want to delete all temporary files.

Firefox 3.5 / 3.6 / 4.0

1. Click the Tools menu, then select Clear Recent History.
2. Choose the time range of cache you'd like to clear.
3. Click on Details and make sure Cache is checked.
4. Select Clear Now.

Firefox 1.5 / 2.0 / 3.0

1. Go to Tools and select Options... (on Linux, go to Edit then Preferences).
2. Go to the Privacy tab and click the Settings button
3. Make sure Cache is checked on the list of options to clear.
4. Return to the Options menu and click the Clear Now button.

Google Chrome

1. Tools menu (the wrench in the upper-right corner)
2. Select Options.
3. Under the Hood tab, click the Clear Browsing data
4. Select the Empty the cache check-box.
5. Click the Clear Browsing Data button.

Safari

1. Edit menu and select Empty Cache
2. Click Empty