Mine would be:
Encouragement and promotion from an early age and normalising it. There’s no real reason mommy has to drive a tank with a 3 piece suite to drop Fintan and Sadbh to school. What’s wrong with a cargo bike with child seats? Older kids (ie, 9 and older) could cycle themselves. Growing up my cousin, my sister and I were walked to school by my mam or aunty and we walked ourselves as we got older, when I was 9 I started cycling myself. I’m 31 now.
Allow helmet cam footage to be more expeditiously used to call bad driving to task.
A reasonable expectation that your bike will still be there and not vandalised when you return.
Enforce misuse of bus lanes and bike lanes unmercifully - zero tolerance.
Encourage large supermarkets who don’t already do so to provide bike parking suitable for cargo bikes. My local has a HUGE car park with no bike parking whatsoever. A single car space could probably fit space for 5 or so cargo bikes.
Abolish VAT on cycling gear.