Ok for all you newbies to paper piecing, here is how I do it, you might find it useful, you may not, but I will share anyway
I color my paper, then I mark the numbers in bold so I am not searching for which piece is next, and it is a lot easier when it is in your own handwriting, you recognise it quicker. Then I take the time to measure each piece, write it down and then cut accordingly, I don't cut with wild abandon but I am generous with my amounts, by about 1/2 inch. Not a lot of wastage.
It is a lot less confusing for me if I have all the pieces cut and laid out before me
I hope this has helped, now I am going to cut my pieces