Taking initiative instead of waiting to see what other countries were doing and closing down pubs, schools, etc one week later than everyone else.
Effective testing and quarantine system for those flying into the country. There still isn't one, 10 months into this, and people aren't fined for breaking quarantine.
Compulsory mask wearing in April, when it became clear it helped reduce spread. No waiting until July, two months after restrictions started being lifted - by this point no one was listening anymore as they were going about their 'normal' lives just as before.
Clear rules around mask exemption. Too many people decide they're exempt when they really aren't, in other countries you carry a medical certificate stating you're exempt. People should be challenged for refusing to not wear a mask when they are able to.
Clear rules around travelling from a high incidence area to a lower one. Same as above, you should be asked why your journey is essential.
Fines for breaking the rules and putting others in danger.
Comprehensive financial support for the self-employed, people at the beginning of their careers, university students with no parental support, early on in the pandemic. Some of these groups still haven't received a penny and have struggled throughout.
A competent team of advisors and ministers who lead by example, instead of taking trips across the country to check their eye sight. The general public might then respect their politicians and be more likely to abide by the rules.