Row counters can be made from a series of chain links with a charm at the bottom. Each time you pass the row counter which is in the midst of your knitting, move it down one link till you get to the charm.
The same can be made with a piece of yarn, tying a series of loops that coincide with the number of rows you have to knit.
One can also use a lobster claw from the jewelry making isle at the local craft store. You can put it on a stitch on the first row and then count down to find out where you are.
I personally find row markers that others (grand kids) can't play with or loose while I'm away from my knitting nook, as well as being attached to my knitting are the best to help me keep my place