Attend to

You should attend to your studies if you plan to succeed in the exams.

Some ten years ago, an evening excursion train from the Walsall area to Manchester, when travelling well over the heavily-graded Walsall-Rugeley line, was brought to a stand at a level crossing at Hednesford by the tardiness of a gatekeeper, who was pottering about in his garden instead of attending to his duties.