Encourage home working... Most office jobs can be done from anywhere with an internet connection and phoneline...
As somebody who did this for 10 years, let me tell you it's not a good idea as a permanent solution for most people. I only do it now if my early morning meetings leave me in my PJs at lunchtime. Some flexibility is good, but it does disrupt communications.
Many staff never need to interact directly with third parties and so have no reason to be at work 9-5.
As somebody who works with colleagues in Shanghai and California, as much overlap of working hours as possible is a good idea.
Convince businesses to get over this stupid obsession of having offices in central london (or other large cities),
When our office in the Soho was closed recently, I would have quit if forced to travel to the other office outside London. Even SE1 is a bit disappointing.
I personally have turned down several job offers that required commuting to central london.
I would refuse too if I had a stupid commute or had to drive. This is why I live in cycling distance and 25km/day is good for my health. Bonus!