More frequent Sunday morning trams
One of the most enduring features of Melbourne's tram timetables has been their 30 minute Sunday morning frequency. Late morning and afternoon Sunday services were boosted to Saturday frequencies just over 10 years ago but earlier headways were left intact. Hence Sunday mornings and evenings were about the only times with a half-hourly service; at other times the rule has been 15 min or better during the day, and 20 minutes at night.
Recent morning service upgrades on St Kilda Rd routes have banished the 30 minute frequency to the first few services only; now frequencies are nearer to 20 minutes between about 8 and 10am. This is a significant improvement that recognises that people are often out and about at these times.
While it's still possible, check and compare old and new timetables for routes like the 67.