I will echo - no pun intended - what the others here have said and do 'echo' quilting as described around the shapes in the main body of your quilt. I would probably do something a bit fancier in the border as you have more room to show off the actual quilting - maybe a simple braid or something along those lines. I would also recommend just a simple plastic stencil for whatever you do in the borders. It's the easiest way. You can either use a piece of masking/painters tape to outline your various blocks/shapes for the echo quilting. For marking more complex designs I use a plain old #2 mechanical pencil. If it's a very dark fabric I use a white version of the same. I can't tell you how many different marking tools I have tried over the years and these work best for me. Test them on your fabrics first but I've never had issues with the marks washing out after the quilting is complete and the binding is on. Enjoy the process.