Bad choice:  not cutting off joining knot in yarn and weaving in ends.

Good choice: put in a lifeline and rip back past where the knot came undone.

Good choice:   choice to tink (undo knitting one stitch at a time) back past a lumpy hole.  

Good choice:  Pull the project off the needles to start again.

Good choice:  Drop the lot in the bin after the project was ripped, as the twist constantly unravelled itself as it was being rewound.

Best choice:  Put the knitting needles away and practice crochet.