My new favourite sewing tool is batting seam tape that I found at the Australasian Quilt Convention yesterday. It's the answer to perfectly joining up bits of batting, instead of buying new whole pieces (or trying to sew them together like I have done in the past - it doesn't work).
Just cut straight edges on two pieces of batting and place them side by side as close as possible. Cut a piece of batting seam tape to length and then iron it across the join. A perfectly stable, flat join. Love!
Being a relative newbie to quilting, I'm sure most of you knew about this product, but for me it was a super find - no more piles of odd ends of batting - they can all be used. This business was where I bought it at the convention yesterday, but it may be available at other places.
Have a lovely Sunday.