safe medication charts

I've been given the assignment of creating new medication charts for our combined ICU/CCU/PICU ward. I could do with some good tips, who has come across a really good @ safe system for medication. How do you solve problems like; Medication for long time stay patients - do you transcripe once chart is full? Verbal orders? Dilution for paeds doses? How do you order the medication from pharmacy? Illegible doc's handwriting? How to clearly show the times medication is due? How to prevent errors in way of giving (oral/iv/im etc)? Looking forwards to your tips. Thanks, Nurina