@MakersHour #MakersHour A4: just make squares. Cast on about 20 stitches, work in garter till it's roughly square, bind off. If you want to keep going when you're done the square, turn it into a scarf instead. If you get really excited about squares, make one every day and you'll have enough for a blanket in a couple months. If not, well, now you know.
But either way, you now have a coaster or a trivet, and the satisfaction of finishing a project.