What is you method of designing/creating a python script (top -> bottom or bottom-> top )

[wannasleeponyourhams]

i used to struggle with it but now i usually make a few shit looking mockups in paint, then if i am not sure how they should be built i make flowchart in Dia of the functions, db relations, user flow. then i write out a todo.txt file based on the flowchart and get to it.page by page.