USCIS Tips On Filing Form I-140

In a June 25, 2009 Q & A, USCIS gave tips on preparing a Form I-140 petition package, responding to the following questions:

• What steps can I take to ensure that my Form I-140 petition will not be rejected by USCIS?
• What if an incorrect visa category is selected in Part 2 of the Form I-140?
• What if the petitioner wants to request consideration of multiple visa categories on behalf of an alien beneficiary?
• What special steps should be taken to file a Form I-140 petition that requires a DOL-approved labor certification?
• When filing my Form I-140, how should I organize the evidence with the petition?
• How can a petitioner request the withdrawal of a Form I-140 petition?