Battery calibration

Well I just scored a 15 inch 2.4 from Bestbuy for 10% off. SOmebody just returned it having never even used it, but they had to discount it because it was opened. I love it.
I love this thing!
We did migration from our imac and everything came over. Amazing

One question about calibration. I charged it fully and let the power cord be in it for an extra 2 or so hours. I then used it unplugged until it basically shut off due to no power. Cant I just plug it in and let it charge all the way without letting it sit for 5 hours. Its not sleeping I dont think. It actually shut off suddenly as it was at zero percent. There is no power to it at all that I can tell. Will charging it now without leaving it unplugged for 5 hours ruin the calibration?

thanks for the help

One last thing. Any top ten must have mac apps recommendations?

 

Will do as much as its killing me. I was trying to run down the battery and saw it got to zero minutes. I closed out safari, mail, and as I was quiting itunes the computer just shut off so I hope I didnt ruin anything. I didnt have anything running in itunes. But it just shut off, not like it normally goes dim, etc. Is it ok?