Set Maps/Waze to "Avoid tolls." The Express Lanes (I-10, I-110, I-405 in OC, SR-91) and the OC toll roads (73, 241, 261, 133) bill the rental company, and they add fees on top.
Regular carpool (HOV) lanes are fine. A full car meets the 2+ rule. Stay out of lanes signed "Express" or "FasTrak".
Rush hours: about 7–10 am and 3–7 pm on weekdays. Add 25% to drive times in LA.
Every garage: post a 📍 update with the level, so the other cars know where you parked.
Gas: fill up away from Disneyland and the airport.