Quilt University has a page called Pressing Tips
http://www.quiltuniversity.com/pressing_tips.htm
I press to the side and 'swirl' the seams at the intersections. That can lead to some problems if not planned in advance so I press one seam to the 'left' & the other to the 'right'. Worse come to worse I will change the side that the seams lies on in the middle between the crossing seams.
When I hand stitch-in-the-ditch the needle easily goes to the side & through the single layer of fabric. I don't even attempt to quilt in the swirl.
Swirl in center
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To the 'left' & to the 'right'
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Pre-planned pressing for block
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