Depending on how your old site was constructed, not all of these steps will be necessary.
Clean Up Old Styling
Some old and possibly non-ADA/508 compliant formatting may have survived the conversion process. Learn how to remove unwanted formatting.
The technique used in SLS1 is not ADA/508 compliant. The old redirect pages from SLS1 need to be replaced with Links.
Clean Up Old Hidden Sections
The technique for hiding folders in SLS1 is not supported in SLS2. Learn how to hide sections in SLS2.