Being a member of The A-Team myself I love it when a plan comes together. But I am also aware of how important it is to always have a plan B or two (what some people call a plan C).
And I firmly believe this is even more true in the digital world. Yes, it is important to have a backup of your data, but that alone does not solve all your problems.
If you are using other people's software (especially commercial software) you have to use the software in the way that other people expects you to use it, otherwise, things might not work properly.
Experience in life teaches you to be prepared when the software does not do what you want it to do but it does what the designers want it to do instead.
So in respect to the websites I am working on, I usually have my plans B and C at hand so that I can say oh yeah I love it when my plans comes together :)