My favourite method of transferring designs is chacopaper.  My favourite brand is Mona Lisa Super Chacopaper, which comes in white and blue.  There are many advantages to using this method:

- there is no need to flip images backwards (as in tracing)

- the lines traced out are very clear with very little smudge around them (unlike dressmaker's carbon paper, which is more dusty than chacopaper)

- the lines disappear completely with either a wet cloth or a simple drenching under a cold running tap

You layer the fabric, the chacopaper (waxy side down) and your design, and draw on the design with a stylus or a pen.  You can tape all these pieces down with a small piece of tape if the design is detailed and might take a while.  That way you can lift up a corner to see how far you have gotten and to make sure all your lines are showing up properly.

I usually like to trace out a batch of stuff at a time and have three four different projects prepped and ready to go.  It makes trips and lazy afternoons even better when I can just pick up a project and run with it.