Do away with a rigid marking policy - it is the one, most pointless and time-consuming thing Ofsted don't require, which makes everyone's lives hell. Assess via short tests regularly instead.
Invest in some classroom technology, which actually improves people's lives - one which links up with other systems (registers, SEND information etc.) you use and which is a one-stop system for all communication. There are brilliant Apps out there, but they are expensive.
Make it compulsory that homework is done via technology, which is self-marking and automatically gives feedback to learners. Same as above - expensive, but brilliant if used correctly.
Have decent IT support and hire more people if necessary.
Support the creation of smaller classes in middle and bottom sets rather than the creation of huge sink sets and ensure the best teachers are stuck in front of these. In top sets, the teacher makes little difference, assuming they know how to cater for the top-end students.
Ensure no barrage of emails - instead, get someone in the office to send out a daily 'morning briefing' email, with vital information for all staff, to do away with pointless meetings.
Support the notion that no after-school meetings take place during weeks, in which staff have parents' evenings on.
Be visible. Learning walk all you want by all means, be supportive, but for goodness sake don't just stand there and observe if a student misbehaves.
Offer up communication with more difficult parents.
The above is a summary of what happens in all the best schools I have worked in, with happier staff as a result.