Gozo day trips get a bad reputation for feeling rushed. Most of that comes from one thing: the coach tours that try to fit the Citadel, Ramla Bay, the Azure Window's remains at Dwejra, and a market stop into six hours. Cut one of those and the day gets much better.
Pick a spine, not a checklist
If you only do two things, make it the Citadel in Victoria and one coastal spot — either Ramla Bay for the red sand, or Dwejra for the geology. Trying to do both in a single day usually means twenty minutes at each, which isn't really seeing either.
Ferry timing
The Ċirkewwa–Mġarr crossing runs roughly every 45 minutes in peak season and takes about 25 minutes. Weekday early-morning crossings (the 6:45 or 7:30) are noticeably quieter than the 9am–11am wave that lines up with coach tour pickups.
Getting around once you're there
Gozo's public bus network radiates out from Victoria, so most day-trippers end up going: ferry → bus to Victoria → bus to whichever coast you picked → bus back to Victoria → ferry home. It sounds like a lot of connections, but each leg is short, and it's considerably cheaper than a private transfer.
Where to eat
Victoria itself has more good, unhurried lunch spots than the harbour town of Mġarr, which is mostly geared toward quick turnarounds before ferry departures. If your day trip includes lunch, it's worth timing it around Victoria rather than the harbour.
The honest trade-off
A guided day trip removes the bus logistics above and adds a fixed schedule. Going independently costs more planning but lets you linger at whichever stop turns out to be worth it. Neither is wrong — it depends on whether you'd rather plan or relax.