Guage check w/ needle sizer holes
Several small tape measures
a pack of crochet hooks
I love my kactha row counter
I put my patterns in sleeve protectors and use dry erasers on it. Write notes mark where I left off etc. It wipes off later and my pattern is safe.
At least two project bags because multiple WIPs is very likely.
A small notebook to write knit related things down
Coiless safety pins
Stitch markers (I use these a lot)
Several pairs of small scissors
Pack of bobbins if you want to do intarsia
Point protectors are a must (you'll know why if your stitches ever fall off your needle)
If you knit with animal fiber a sweater soak or wool wash is nice.
Chibi darning/tapestry needle.
I think that is it.....