Knit your ribbing with your ribber then transfer stitches to the main bed and continue knitting single bed A Transfer Carriage can make quick work of this (standard gauge machines only)
Single layer of Ribbing
Choose your needle arrangement (1x1, 2x1, 2x2 etc)
Remember to plan for a neat seam
Doubled Ribbing
Make it extra-warm over the ears
Don't forget to hide the seaming stitches.
Ribbed Hat
Consider knitting the entire hat in ribbing - just knit the desired length and gather the top. Easy-Peasy!