Now you may ask yourself, why am I qualified to do this? Well to be honest I'm not expert. I'm not Day9 and I'm not a pro player. I am a very good player and I feel like I have an extensive knowledge of terran so I feel like I am somewhat qualified to answer these questions.
A little about me. Obviously my name is Beammeup, I played SC 1 and BW for about 5 years before moving on to other games (Other games being Day of defeat, Natural Selection, Counter Strike, WoW, etc...) I used a friends account to be able to play in the beta and have been playing since. I love games and I love community so I feel as a good player I owe it to the community to help and thus perhaps grow the community.
Now as for you trolls, I know you're there... you know you're there... even God knows you're there... I ask for the sake of all humanity to try your best to control yourselves.
Finally, if you feel like I have answered a question wrong please feel free to correct me. I am, as previously stated, by no means an expert; if I am wrong then I am wrong and as this is to help the community I'll do my best to check my ego at the door.
Thanks to you all and happy posting.
EDIT: I'd also like to add a section for threads I think are very informative and helpful.
This is my How To: Attacking guide, it has a link to many other guides and although the guide(s) are a bit dated and I have learned a great deal since then they are still good reads.
Disclaimer: I'd like to ask that you post any questions you have from that guide (and others) here, so the information is all in one place.
WinterBorn has an excellent macro guide, I highly recommend it.
My new thread on How To: Advanced. Should be a good read for explaining some concepts.