Last week as I was in a hurry to get a black dress made for a customer to wear to a funeral, I sewed a seam in error. UGH!  Ripping out seams is a chore in itself, but in black fabric is even worse.  I pulled out my trusty 500 Kwik and Easy Sewing Tips book to find an easy way to get the black thread out of the black fabric.  You can see the information about this very handy book at BigBeautifulPeople.com/500tips.htm.  I found just what I was looking for - "Ripping out a seamline on dark fabrics is almost impossible to do.  If you run a tailors chalk line down the seam line, you'll be able to see the stitches much better", and then "an old soft toothbrush will be a big help in removing thread ends that remain after ripping out a seam" AND gets rid of the tailors chalk line.  The best idea, if I'd been thinking ahead was if you're sewing a lot of seams, it will be easier to pin them all at one time, then sew them continuously, leaving an inch of thread between each piece, then simply cut them apart later.  Also if one of the first ones needs another seam, lay it to one side and add it to the end as you finish the "pile" of seams previously pinned.   Perhaps I wouldn't have made my sewing error if I had simply slowed down a little, and done some of the little things that makes the sewing process easier and quicker.