Custom Games: Key Strategies for Starcraft 2 Macro

I'm playing a TvT game against a friend the other day, and I have him beat.  I've out-expanded him, harassed his mineral line, and have equal tech, if not better upgrades.  And I lose.  What the heck happened?

Two things - first, I lost the big battle.  I threw units away by pushing his better position while trying to get in position myself.  I should have waited, taken my losses, and let him come to me.  When he'd unsieged, hit him.  Second, I had 6k minerals and 2k gas in the bank. My main was covered with buildings, but I still didn't have enough units coming out.  We were both at around 132 supply, and I should have been higher.

This is why Terran bases look like SimCity - you just need a whole lot of production buildings eventually, and in the smaller main-bases, there really isn't a lot of starting area.

Some Terran tips:

• First, plan for the midgame.  You're going to want to end up with about 4-5 barracks, 2 factories, and 1-2 Starports.  You are going to want an Engineering Bay around 30 supply for emergency turrets, and an Armory around 60-80 supply for those Tier 3 units like the Thor, or even just for upgrades.
• Upgrade attack first.  You are ranged, so you get the first shots in.  You want things to die before they reach you.  With Stim, you can kite, so it doesn't matter how much damage you can take - only how much you can dish out and how fast.
• Micro your Marauders in front of your marines.  Marines are squishy.  Marauders aren't.  Banelings & Zealots, units you'll see often, will chew up marines easily.

Good luck!