Give the character two pressures that cannot both be satisfied easily. Make the choice respond to those pressures, then show a consequence. A conflict is stronger when the reader understands why each option matters.
Worked example
A character wants to keep a promise and avoid disappointing a friend, but the promised action conflicts with the friend's request. The decision reveals priorities when the story shows both pressures.
The Solo and the Team
Rae has promised to help finish the team's stage set after school. That afternoon, a visiting musician offers a one-time audition at the same hour. Rae wants the audition, but the team cannot finish its largest piece without help. The writer wants the conflict to reveal Rae's priorities rather than disappear by coincidence.