Building the Mobile site on the new builder
This should have been obvious to me, but it wasn't. I built several pages before tackling the Mobile and then spent lots of hours (frustrating, painful, nerve-wracking) trying to get the mobile version to look even half-way decent, sometimes successfully and sometimes I had to completely re-do the desktop version. The should-have-been obvious part? Build the mobile as you go. I now add a few things on the desktop and then adjust on the mobile. Infinitely easier and more successful, less wasted hours and fewer temper tantrums and soap words.