大事だいじの前まえの小事しょうじ

1. 1don't put the trivial ahead of the important ; don't sweat the small stuff ; don't bother with the details (before embarking on a great enterprise) Translated by Jiyomi
2. 2read the fine print ; be careful of the small things (before embarking on a great enterprise)

JMdict entry 2418880. Source and licence.