The day is fast approaching. In 15 years or so.

So, just to satisfy my curiosity, I'll be asking what may seem like novice questions to you old pros.
Today's gem;
Without getting too specific, if I (theoretically) have a core/satellite (is that what you call it?) portfolio, with the big 3 (Total Stock, Total International, Total Bond) as 70% (or so) of the total value, and a few added extras like Small Cap Value, Emerging Markets, REIT, and Health Care rounding it out...
Is there a -best- way to draw this (taxable)account down?
Would you A) trim a little off from each every year
or B) trim off the extras and keep the core?
Didn't want to get too specific, so
A) People wouldn't yell at me for my silly portfolio, and
B) My allocations may very well change in the next 15 years, and
C) Getting too specific requires too much effort just to satisfy my curiosity at this point.
Thanks in advance! Like I said, just curious to hear some opinions.
TM