I find that a small basket to hold things I use all the time for sewing has been my favorite sewing essential..what is in the basket:
small adjustable ruler
extra sewing machine needles
a few bobbins filled with black and white thread
a spool of white and a spool of black thread
chopstick to poke out corners
retractable tape measure
a bag of MM's
When I travel, I throw in my big scissors, my rotary cutter, my huge tape measure, a cutting board, my magnetic pin holder, my pincushion loaded with needles, and along with my emergency iron, which stays in my car, I am ready to go sew anywhere! oh--and my sewing machine!
l love your blog challenge, lenarrrd---very humbling and true for me as well...hmmm---a year of only sewn clothes...I admire you!