You can't copy people's strats, not because its their intellectual property, but because it just doesn't work and slows you down.
Best thing to do is be fast! If you are terran, make a wall on your cliff ramp out of a supply depot, your first bunker, and first barracks. Always build a bunker with a barracks to fend off a rush. Also, when you build an expansion, build it in your first base and then fly the new Command Center into the place you want to expand.
Keep your distance from Zealots (protoss melee guys). Zerglings get destroyed by Terran Hellions. Marauders aren't very good against Zerg. Constantly build workers and expand (if its financially viable). Only 3 workers should go on each Vespene thing.
Don't turtle -- don't just sit in your base and build, waiting for the fight to come to you, because if you do, the other team will destroy your workers and you won't be generating an income to rebuild your army and fight back.
Don't use battle cruisers if you are going to fight Protoss. Destroy Protoss prisms that are around their war buildings, that will cripple their army creation. For fighting zerg, destroy the queen first, then the lair.. or if you don't have enough power, go for the hydralisk den or the Greater spire. Terran has strong air units. I should get a medal for loving this unsupported game.