How do YOU fall back asleep?

My son is 5 months old and has been a good sleeper since we exited the newborn days. He's recently gone from sleeping through to one overnight wake, which is theoretically fine EXCEPT that I can't get back to sleep afterwards. Last night he was up for a quick feed at 2am, but I didn't manage to fall back asleep until around 4.30/5am 🧟‍♀️

So, mums (and dads) - anyone else face this problem? What are your tips?