|I recently subscribed to Burda WOF and therefore began tracing my patterns onto drafting trace paper. Since Burda's patterns don't include seam allowance, I would dash in a second line 5/8" from the seam line.
Finally a eureka moment... 2 pencils held together with a rubber band. I cut cardboard spacers and inserted them between the pencils until the points were 5/8" apart.
It's not pretty, (see the web link above) but it sure gets the job done...