There are lots of methods, I say try a few and see what works for you, you can use pounce, golden threads paper, frixion pens, generals chalk pencils, They have special pencils and pens on the market, just test on scraps before using it on the real quilt. I would just buy cheap muslin and batting and make practice squares, and try different methods and see what you like best, also some work better for different fabrics, like pounce is not the best for really light quilts, and the frixion pens are not the best for really dark quilts