I water down my glue to about 70% glue to 30% water which makes it flow well enough if I open the tip to fully open. I drizzle in a wide zigzag with about 3-4in between the lines and I make sure to do a line completely around the edges of the quilt and of the area I'm gluing. So basically, a big rectangle with zigzags inside! Then, I use a spackle spreader ($1 at Walmart) to spread out the glue lines some because I figure it helps glue down more area and the spread out glue doesn't make hard little lumps. I always make sure to drizzle the glue on the batting instead of the fabric because I find the glue bonds better that way.
Normally, I have the batting on the bottom and the fabric (top or backing) that I'm trying to glue laying on top of the batting. In the picture, I have it backwards but I was trying to make sure the batting lined up perfectly with the notebook cover fabric so that's why I have it this way
