Try to leave yourself three months to get all of your business affairs and personal documents in order. Remember you will be relying on other people to process your applications etc. so it is out of your hands how long it will take.
Begin consular procedures, request information on how to obtain your visa, residency and work permits before you leave. These procedures take time, sometimes many weeks - even months. Begin as soon as possible. Check the documents required for the exportation of your goods from your country of origin and for their importation into the country of destination. Your status may enable you to benefit from certain advantages, such as the obtaining of an " EXEMPTION ". This will avoid you having to pay duties and taxes upon importing your used personal effects.
Consider renewing your passport and those of all accompanying family members. These should be valid, at least, until your next return to your country. Establish international driving licenses. Depending on the country of destination, you might have to obtain a local driving license by going to a local driving school and eventually passing a practical /theoretical driving test. In all cases, keep your actual driving license with you. It may be requested by the local authorities in order for you to avoid having to pass a test.