This is the fastest and easiest cast-on method I know.

use a yarn rest / scrap yarn of same thickness than your working yarn (legth should be longer than the width of the piece you will knit).

make a knot at the end and tie it onto your right hand needle.

Hold the long yarn end parallel to the needle in your right hand.

Hold the short tail of working yarn with your right hand and wind the yarn around needle and helping thread, building a spiral.
that’s all

I recommend winding a few more spirals than you actually need, you can then easily adapt your stitch count.

Once finished, untie the knot from the needle tip and pull out the helping thread so that no stitches will drop down.

When knitting your first row, you can knit as many stitches as needed, the surplus stitches can be dropped off.

When picking up stitches from this cast on, just replace the helping thread by a knitting needle (it is easier to use a smaller needle)

This cast on method creates a first row (in contrary to a crochet cast on, where the cast-on-row will be unravelled.)

If you are a tight knitter, you may use the needle size you would use to get gauge. If you are a loose knitter, you might use a thicker needle to get the same stitch size.For best results I recommend to knit a swatch.

Garnrest gleicher Qualität (ca. 60cm lang) am Ende der Nadel mit kurzem Ende anbinden. Arbeitsfaden um Nadel und Garn wickeln, (1 Wicklung je Masche), bis die gewünschte Maschen¬zahl erreicht ist. Den Hilfsfaden lösen und den Faden ein Stück herausziehen, damit die Maschen nicht herunterfallen. Dann stricken.

#tutorial_by_hintermstein