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She makes it a habit to jog before breakfast.
Literal
She [topic-は] breakfast [before-前に] jogging [object-を] do [decided-ことにしている].
~ことにしている marks a self-imposed routine — 'she has decided to jog before breakfast (and continues to do so).' ジョギング is a loanword from English. This pattern is extremely productive for describing any habitual practice — exercise routines, reading habits, dietary choices, etc.