Love. Treat them as normal kids with unique needs. Find them a caring competent pediatrician and endocrinologist. Listen, assess, let them know your limits, let them figure out answers on their own for the most part, but always with appropriate limitations. Don't spoil them or let them develop an attitude of feeling entitled. Sound like good advice for any parent? It is.
Being supportive. With support, affection and avoiding punitive measures as much as possible. Empowering the child (with supervision) when age appropriate on how to check bs and give Insulin also helps. And remember, highs and lows will happen regardless of how savvy we are in counting carbs so the best approach is always to provide encouragement and to remind him/her that better days are to come and that's it's ok.