IRON TOWARD THE DARK
This is a simple tip but it is an important one. After sewing a light and dark piece of fabric together, iron your seam toward the dark fabric. This will keep uneven, dark seams from peeking out through the lighter fabric.
See this cute table runner I made for Christmas a few years ago?
Well if you look closely you can see the red visible through the white fabric in several places on the quilt. Boooooooo!
You may be thinking, “I’m not going to look at anything that closely.” But trust me, you can see it without being very close at all. And it’s a bummer every time I notice it.
Iron toward the dark.