In the office area, hanging ceilings everywhere, with at least 1.5 inches free space above the tiles so that any given tile can all be lifted when necessary.
As possible, put HVAC over offices and power/data over hallways. Any filters should be changeable from hallways so that you don't need to stand on somebody's desk a few times a year.
Above hallways, cable trays for data (with tops if required by code), with clear space above and adjacent to the tray. Trays are much easier to deal with than conduit.
In offices, double-gang boxes for data with 0.75 inch conduit running above ceiling tiles and turning to point towards the trays. If code requires, they can be run into the sides of the trays. Adjacent to each data, put a duplex outlet. Generally, two boxes per office on opposite walls that allow a base cable to reach anywhere in the office without crossing a door or window.
Use structured wiring (RJ45) for telco, even if you have a PBX that would prefer 110 blocks. It is much more future-proof.
Unless union rules preclude your use of a man-lift, put IT assets in the shop area 8+ feet above ground to protect against fork-lift damage. Even better, if distance limitations permit (generally, 80 Meters) keep electronics in office area -- especially those devices with fans.
If cables and fibers do not arrive pre-terminated, insist on a good testing tool to validate reliability. Come to think of it, a good testing tool is needed period.