I don't think having a plan could be called "structure" (I may be wrong), I think that the OOP is refering to a structure in life that you have to follow to accomplish things.
I call it like that, because structure will make me plan for example: an application. If I don't have a structure, I automatically don't know where to begin from, and thus procrastinate.
Fun fact: I've only now noticed, that "procastination" should be spelled "procRastination"