I only use the slipped stitch thing for scarves. However, when I am binding off a sequence of stitches...such as at a neckline edge or armhole edge...rather than knit first stitch, I slip it, knit the second, and then pull the slipped stitch over the 2nd knit stitch, thereby concluding the bind off of one. The rest of the prescribed bind offs for that particular row are knit and bound off as normal.
I got this tip from Elsebeth Lavold, the Viking Knits designer.
She said that by slipping the first stitch of the bind off row...you get a smoother edge along the neckline (or armhole) edge. It's true.
For me, I knit the first and last stitch of every row whenever possible...creating a garter column at each edge...for easier mattress seaming later on. They call this an 'edge stitch'. These 2 photos are part of a Central Park Hoodie KAL (with photo tutorials) that I am hosting here at KH.
Yes, and you can perform a short row treatment with a 3-needle bind off for shoulders. It is very smooth. Especially if you feel unsure about mattress seaming "tiered" or "stair stepped" shoulder edges together. However, by slipping the first stitch of each bind off series (as I stated above)...your shoulder edges are not as radically tiered, and much easier to mattress seam!