There's a video under the Free Videos tab at the top of the page, Demo of a Small Project
that may help. Even though it's not garter stitch, Amy does show the end of the row and how to begin the next row with a knit st. It may help with that last st at the end of the row which is sometimes looser than you would like. She also shows you how to slip the first st in a row which will neaten up the ends if you are making a project like a scarf where the ends of the rows will show.
Also, I find that the sloppy end sts go away or tighten up with practice. Enjoy your knitting!