Let's take a look at some directions:
k2, m1, k till last 2 sts, m1, k2 (increase round)
repeat increase round every 8 rows 3 more times
I used to read instructions like that and write notes to myself about which row number would have the increase action. If the first set of increases happened on row 25, then I'd jot down that they get repeated on rows 33, 41, and 49, and I'd use my row counter to keep track of which row number I was working. There's nothing intuitive about those numbers, though, so I'd have to keep referencing my notes in order to remember which rows to anticipate.
I now use the counter in a different way. For a situation like this, the tens place represents how many increase rows have been done, and the ones place represents how many rows it has been since the last increase. When I'm on the first increase row, I reset the counter to "1-0." With subsequent rows, the ones place gets increased till I get to "1-7"

Since we're increasing every 8 rows in this example, the next row will be an increase row, and the counter gets set to "2-0". I knit on till I get to "2-7," and then "3-0" comes next. Skipping forward, we get to "3-7", and then finally "4-0." That means 4 increases have been completed, so I'm done with that section of the pattern.
How do you use your counter?
*ETA: I had to go back and edit because I mixed up my increases and decreases. Doh! Thanks for catching that, Sue :-)