Following my DNA match plan, I am looking at my top 23andMe match (not counting "my testers")
My top match is Gail J. I match her 2.07%, 154cM in 9 segments. She is predicted to be a 2nd to 3rd cousin. I have already solved this match. She is my 2nd cousin twice removed. Our common ancestors are John Thomas Lloyd and Grace Elizabeth Slocum.
I match her on chromosomes 1, 3, 3, 6, 6, 7, 11, 12 and 15.
I went to the first segment match in GMP and entered the MRCA and then hit MARK to mark the other segments with the same MRCA.
Sadly, because of my current 23andMe glitch, I can not do the many compares that 529andYou suggests.
Also sadly, Gail has not uploaded to Gedmatch or to FTDNA. I sent her a follow up message at 23andMe