when you first start up it can be worrying,different ways of getting paid,getting yourself noticed,it sounds like you need to know more about the printing side of it
standard printing methods
resoultion:300 dpi some printers use 1200 dpi so check with them
bleed/cut "this is where the printers cut your design "some are 6mm or 4mm allways check.
i can supply you printing templates for flyer's,business card's,poster's extra
wear it shows you the cutting where the printers will cut their are marks on the template so you can put your design on and see it images are in the cut/bleed area.e-mail and i'll e-mail you them for free email@example.com
nice one andy