Happily, history presents us some potent examples (Social Security, civil rights legislation) of how big, complex bills should be done.

Take your time. Try to tune in to the mood of the country. Get some support if you can from the opposite party. Democrats in 2009 to 2010 may heard of this somewhere, but went out of their way to do exactly the opposite, and passed health care fast on the smallest of margins, enraged the Republicans almost on purpose, and courted disaster by insisting on passing their measure after the public screamed ‘no.’