-Start mining with all workers and make more until 10/10 psi
-Get defence whenever you can and add on when needed
-Build 3 depots and 3 barracks
-Get workers until about 25/34 or something like that
-Build academy and 3 factories with its addon for seige upgrade
-Get a starport or 2 then get a science facility with covert ops
-Don't forget 2 engineering bays and 2 armories for upgrades
-Get massive ghosts with medics and back them up with tanks and a science vessel or 2
-If you can get a nuke get it and cloak and distance if you decide to nuke
-Send in tanks to take out front defence and patrol vessels
-Unseige tanks and send them in right before you send in the ghosts and medics
-To make a ncie affect take units back out and nuke the economy

~NOTE#1~ If there is more then one enemy save nuke and some tanks at your base

~NOTE#2~ If you are playing protoss remember to get lockdown and extra energy for ghosts

CreepColony's Opinion: Nuking can be good for taking out mechanical units. Let's say your bombing stuff with your tanks, and your opponent sends 12 bcs to kill them. Just lock all of them down and NUKE!