Advice for transitioning with baby #2

Heather • Mother to one boy, three babies with wings, pregnant for the fifth time

My son is 16 months old and we’re expecting baby number 2 in April. Luckily, he’s pretty independent. He plays independently, has been using sippy cups (no bottles) for several months, sleeps well in his crib for naps and 12 hours at night. Still, I worry about how the transition from one to two will go. Any advice?