To update prior moving

Inoculations and vaccinations. If possible, check what you will need in the new location, as well as any treatments you or members ofyour family are due for - it is often easier to have any injections in a place with which you are familiar rather than having to deal with even more logistical pressures in a new and unfamiliar place. Furthermore, you might be denied entry to a country if  vaccinations are not in compliance with the country requirements.

Any health checks, bi-annual, annual, mammograms etc. Again, these are easier in familiar surroundings.

Any dental treatment that may be necessary is better dealt with prior to a move.

Direct debit(s). If you have any of these outstanding, ensure which property they refer to and adjust if necessary, keeping the company involved informed of any action you take.

If you are selling a house and moving to a place where the postal service is not completely efficient, try and make provision for final bills etc. You may be charged, face legal action or incur logistical problems receiving credits for over-payment on your part.

Ensure you have a forwarding address and find a safe way of having your mail taken care of, handled and forwarded while you are in transit.

Provision of adequate funding into any account that you may be using more than usually during a period of transience.

Provision of funding in new location. Your first month or two is always tight on funding due to deposits being paid out, registration for schools, entry to clubs etc.
Checking accounts take time to issue either cheque books or credit cards, so you may be heavily reliant on cash, which in turn can give security problems in some places.

Wills should be updated, taking into account the change of ownership if appropriate and where possible. Even if you don't deal with the finer details, at least you should have made general provision for expected changes, so that if one of you should die, action can be taken as you intended it, rather than leaving anything in the hands of either government or country officials who neither know, nor are aware of your wishes.

Prior to a move, prepare and keep appropriate photographs for a mini scrap book for your children (for the transient period). Photographs are important reminders for children and will considerably reassure and settle them during a move.

Ensure you have all the addresses and contacts of people you may want to contact during a move - you may think you know all your friends' house addresses and telephone numbers, but removed from your familiar surroundings, it is surprising how hard even simple tasks become, so the more organized you are with this sort of matters, the less stressful situations become when faced with other pressures.