Congratulations on reaching retirement! If I interpret your name right, you retired at 38 years of age...is that right? If so, awesome!
I don't have any solid advice for you since I haven't reached FI yet, but I'm thinking of doing a Substantially Equal Periodic Payment (SEPP) with my 401k money, which I plan to roll over to an IRA.
The one thing I will warn you about is that SEPPs can be limited by current interest rates, which are abismally low right now. You may want to wait a bit until interest rates rise, unles you would be satisfied with low payments.
I am very interested to hear what the rest of the community has to say about this.