I was gonna build a shed to put all that junk in, but all my tools were out in the garage under a big pile of junk.
Convict, I think masons have an official name for that curb, but I can't remember what. You mean at the bottom of garage door opening at each side, right? Make sure its clean and really goopy in there at ends of your sill and behind the "rim joist". On side of mine was real sloppy as if the suddenly ran out of concrete and couldn't fill the form on out, I had to pack it out square with patch mix.
Resize photos on line http://www.picresize.com/
Measure twice, cut once.
Look at the nail, not the hammer. Watch the fence, not the blade.
If you hook your thumb over your belt you won't hit it with the hammer or leave it layin on the saw table.