To make sure your long nails remain that use cuticle oil daily. Rub it into the skin surrounding cuticle and leave overnight. The oil will nourish the root of the nail, thus, producing more flexible nails which will be resistant to breaking (when you apply pressure it will rather bend) and spiltting.
For dry skin on you hands I would advice regular exfoliation (at least once a week) and paraffin treatment. Also make sure you moisturise your hands every time after you have contact with water.
If the nails feel to sharp use a soft sponge buffer at the edge. This is a good example: http://www.beautyagents.co.uk/epages/es137343.sf/en_GB/?ObjectPath=/Shops/es137343/Products/F1300
Please visit our website for more advice on how to look after hands and nails: http://www.beautyagents.co.uk/epages/es137343.sf/en_GB/?ObjectPath=/Shops/es137343/Categories/Aftercare/Nails_Aftercare