If I have lots of strips to cut from a large piece of fabric, I fold my fabric
selvage to selvage and start cutting at the fold. I cut double width then
re-cut...that way I don't lose my straight grain as quickly as cutting strip by
strip. The first strip is a smidge wider than the width of two strips because I
will trim that smidge at the folded edge afterwards. If I don't add a smidge
the width could be a little off when I cut right on the fold. Don't know if this
makes sense but that's how I do it and it works for me. :) Oh and I starch
my fabric heavily before cutting. Must be the strangest method of cutting
but I came up with this one day and was very happy how it came out.
When the fabric is heavily starched I have a problem finding the straight
grain so I fold the fabric in half and that's where my straight grain falls. :-D