Flat chain seam
Kitchener stitch grafting
Four Favorite Seam Finishes for Sweater Knits
How to join garter stitches invisibly
When sewing bulky sweater knits, you don’t want the seam to be bulky.
* Sew the seam with the sewing machine.
* Overlock each seam allowance separately.
* Steam the seam open.
* Tack the seam allowances down with a catch stitch.
Source: http://www.craftingfashion.com/search/label/serger%20techniques
A video about this subject: https://www.youtube.com/watch?time_continue=41&v=d783OdG_7fs
Fool proof way to seam garter ends (without grafting)
Lots of knitters like to knit the projects, but don’t like putting it together. This may help.
A way to crochet a side seam on knitted item
There isn’t any talking, just showing how to do it. Looks easy! I’ll have to try this.
Faster, Flatter Mattress Stitch
Easy to do and looks nice when done.
Help for putting seams in knitting.

Most knitters don’t like putting seams in things. Hopefully this will help.