After signup, the url for logging in is https://jasminepm.cloudforce.com
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To change your username, goto:

Your Name->Setup->My Personal Information->Edit->Username

Change your timezone, goto:

Your Name->Setup->My Personal Information->Edit->Time Zone

Set your work hours, goto:

Your Name->Setup->Develop->Custom Settings->"Manage" Calendar Config->Edit

- Day Start

- Day End
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Turn off Salesforce newsletter
Your Name->Setup->My Personal Information->Edit->salesforce.com Newsletter Settings

Here is a link to a screen cast which covers this quick start: http://youtu.be/JTV9syrbFCQ
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