Yard intervention day 3

Yesterday was too windy to attempt to put down newspaper and straw, but today was a good day.  I got the entire backyard covered in both straw and newspaper, though I ran out of newspaper before I ran out of yard.  I started saving newspaper in March, realizing that I could both reduce the amount of recycling we (I, in this case) produce and have a handy, ever replenishing source of ground cover.  The problem is that there is never enough. I had two months of newspaper to work with, which is a rather large stack of eight inches or so. But that wasn't enough for the entire back yard.  I ended up pulling some half disintegrated cardboard from the side yard.  It worked fine, but now what will I do about the side yard?