Can't Play on Xbox Live? Troubleshooting Checklist

I need more details to help. Please provide:

• Specific error message?
• What are you trying to do? (play game, join party, access store)
• Wired or wireless connection?
• Tried restarting console and modem/router?
• Checked Xbox Live Status for outages?
• Using correct account credentials?

With more info, I can give specific troubleshooting steps.