Jim, I'm sure you have the basics down. But just some goalposts.
1- Most people will tell you to defer receipt of Social Security as long as you can to enhance the benefit payout. You can do the numbers to see impact on total payout you will receive based on life expectancy if you trigger payments at an earlier age versus waiting until the max age.
2- One thing that I can't stress enough is the ordering of distributions. If you have say a 401k that will be taxed on distribution, you lose the compounding impact by having a distribution from the account. It's better to maintain the full nest egg and let the performance continue to accrue on the full amount versus having a distribution, paying tax on it, and then having the residual amount have investment performance on it. So, people will advise on drawing down taxed amounts first before accessing tax deferred amounts.
3- Your biggest unknown is certainly the cost of medical going forward. Talk to an advisor on the merits or disadvantages of securing a long term care policy. You are still young enough to not make the premiums cost prohibitive if you are in relatively good health. There are pros and cons versus simply earmarking funds and not touching those funds. But there is some benefits in having the security of a policy and knowing that your kids won't have additional burden at some point in the future.
4- People will tell you the benefits of how you should allocate your portfolio between stocks and fixed income. Lots of people stick to the equation of saying 1-your age as the amount to be in equities. This is a tough one when you have to consider the possibility of living much longer than you expect. So, talk this through to see what the pros say on your split for your age.
5- Probably the best advice is to assemble an amount of cash that will be available for x years to start your retirement. Some will say three years, I made sure I had five years at the ready so I don't have to touch anything for the first five years other than the funds I established. It's an adjustment when you see amounts declining and not having a regular paycheck. So, build up a fund to use for 3-5 years before you need to access your "retirement" funds like 401k, pension, IRA, other investments, etc,
The other thing is to have a plan for the beginning of your retirement. It's an adjustment so whether it be a trip that you always wanted to take, a course of some kind, learning to play the guitar, speak another language. Have some plans rather than just waking up that first day.
Congrats though in approaching the end of the work road!!