Oakland, Calif., attorney Jon Eisenberg has some advice for same-sex couples looking to say “I do” on June 16: “Don’t get married in a fever.”

The appellate specialist isn’t just channeling Johnny Cash. Even though the California Supreme Court on June 4 refused to stay its May 15 decision legalizing gay marriage, obstacles remain for same-sex couples who want to tie the knot when the ruling becomes final at 5 p.m. on June 16.