Backup and archive strategy and method?

[xoshooter]

Bought superduper. Yeah me. Now what? Never had a backup strategy and realizing time is against me for something to go wrong. I am a photographer and after a shoot download from laptop on the road to external hard drive (fw800) and then burn dvds to be kept offsite.

What about a real strategy for documents/quicken/itunes etc. Is there a strategy to use here. I know there is a different bet. backup and archive.

do I need 'more' software or is SD enough?

I have a mac mdd-d867 g4. Willing to get more storage if necessary. Do not want to go .mac way.

Any thoughts.