Strategy & Tactics

Macro
"Macro-management" relates to the whole of base development & expansion, army-scale maneuvers, and lateral thinking on the battlefield.

Use persistent area orders
Holding the Alt key when issuing a Repair, Reclaim, Resurrect or other order to constructor units will cause them to queue that action the second a valid target for it appears in the selected area. If a unit dies and leaves a wreck inside a Reclaim area, assigned constructor units will immediately go to the wreck and get the valuable metal. This saves you time on having to issue those orders manually, and also lets you make specific, dedicated orders when just a blanket Fight or Patrol order may not be what you want.

Always queue multiple base buildings
Especially when you need to focus on micro-managing your army, it is very smart to keep one constructor unit actively building up your base. Queue up energy generators & converters, nano-turrets, even defenses. Do it even if you don't think you need them at the time; an idle constructor doesn't help you. If you need to build something specific immediately, hold down Space while issuing the construction order to move that to the front of the builder's queue.

Spacebar to split building orders
Holding Space when giving build orders to constructors will cause them to split the work evenly among themselves—three cons set to build three wind generators will have one con build a wind each. This may dilute the buildpower you want to build those structures faster (though this can be rectified with Nano-Turrets), but it does have the potential to greatly reduce the downtime of your cons. This command macro is especially useful when laying minefields, as minelayers cannot assist-build each other's mines (and they build blazingly fast anyway). You can issue a wide grid build order and have each individual minelayer build their own set of mines, which will greatly improve efficiency.

Resurrection Bot tips
A single Rector or Necro actively reclaiming trees for energy makes roughly as much as 3 Solar Collectors combined. On tree-heavy maps, this can give you some extra metal to jumpstart your unit production.

Several rezbots actively repairing Hammers or Thuds makes for a very tough push, especially as the line of plasma bots will block some fire that might otherwise hit the units repairing from behind them.

If you are lucky enough to come across undefended structures or stunned enemies (Bladewings are very good at this), rezbots can directly Reclaim any enemy and get 100% of the metal value that created them.

If you know you are going to have to abandon a position, or you just need emergency metal to build a specific counter unit (or to upgrade to T2), you can use your rezbots to Reclaim your own forces and get a full refund on your metal. This may be just enough to push you into

Micro
"Micro-management" is the direct control of units or structures to maneuver them for maximum tactical advantage during battle. Properly micro-ed units can punch well above their weight and turn a losing engagement into a win.

A.K. vs. Peewee
The Cortex light infantry bot possesses more range and accuracy than its Armada counterpart. Assuming even numbers, the A.K.'s should not be moved towards the Peewees, but instead maneuvered to keep them at just enough distance to fire while forcing the Peewees to give chase.

Hide behind your enemy's buildings
When raiding your enemy's economy, using either scouts or infantry, it is possible to maneuver your units behind their buildings so you are not fired upon by LLTs. Laser turrets cannot shoot through their own side's buildings. This is especially useful with However, they WILL shoot wreckage to get to you, so don't hide behind dead buildings!

Transporting nanos and turrets
The T1 air transport can lift Nano-Turrets and deploy them anywhere they're needed, such as in the middle of a wreckage field to reclaim all that juicy metal. T2 air transports and any heavy transport (including hover transport and the transport ship) can also carry LLTs, Beamers/HLLTs, missile towers, radar and such to instantly create a defensive perimeter on the spot.