If you are really into electronics and robotics, then you must MUST make your own PCB's.
Introduction to PCB etching using toner transfer method
In the following technique, I use a solution of hydrochloric acid (Muriatic acid) and Hydrogen peroxide and drop my copper board into it. Within a blink of an eye, you find that the board has etched and your circuit is ready to conquer the world.
If you feel that the instructable is summerized, feel free to check out the complete documentation and a video tutorial in my site:
Fine sand paper or Kitchen Scrubber
Muriatic Acid / Hydrochloric Acid (HCL)
Hydrogen Peroxide (H2O2)
Thinner / Acetone
Electronic or Hand Driller
Fine Drill Bits (0.5mm and 1mm)
Step 1: Paper and Printer selection
Selecting an appropriate paper is your first step in making a right selection. Glossy photo quality paper or even a glossy thick magazine sheet would do wonders
I have used a printer to transfer the circuit diagram onto the copper board. If you are using a sharpie or a marker, go ahead with it. I haven't tested it, but I guess it should be OK.
Set your printer to output maximum toner and printer your circuit on the glossy paper