①

Publicize the fact that you are out wandering 50% of the time, and that your colleagues are as well (if you and they are).

②

Be meticulous in having meetings in others' offices/spaces rather than yours.

③

Evaluate managers in part – and directly – on the basis of their people's assessment of how well/how frequently they are in touch.

④

Fire a supervisor who doesn't know all his people's first and last names.

⑤

Hold meetings and reviews in the field.

⑥

Start randomly popping into offices and asking the inhabitants why they aren't out.

⑦

If you are a manufacturing, or an R&D boss, etc., make sure you have a second office in the workplace.