A lot depends on just how much offset info you have - I'm more used to 'frontier' drilling where offset info can be very limited, but the basics always boil down to:
A) Talk with the G&G people to find out which are the most valid offsets for the geological setting you are going to be in - this may not be the nearest well geographically.
B) A good mud log is worth it's weight in gold (incidentally, I've never seen a mud log tabulated by date instead of depth).
C) The Daily Drilling Reports need to be read by an experienced person, not a TA - "they round tripped from 2,000m to change the bit, but why did it take 12 hrs?". Also, if it's a more recent well where the time breakdown was coded - don't go by the codes, always go back to the original DDR as all too often the coding has been haphazardly applied. Software analysis can be very useful, but crud in = crud out.
D) While the more recent the well, the more complete and valid the data set, 'old' wells should not be ignored (I've gone back as far as a well drilled in the 1930's to get valuable information) as they can also provide valid insight into problems encountered and even things like seeing how casing designs have changed over time if there are several wells in the area.
E) Already mentioned, but worth repeating - try and validate the survey data, ESPECIALLY the actual surface location (including co-ordinate reference used) as in older Wells they may not actually be where you think they are (case in point, had to find a well in the Southern North Sea to P&A it. Drilled in the mid 1960's, we eventually found it about 1 1/2 miles from the posted location).
F) Already mentioned, but again worth repeating, if G&G haven't re-processed and analysed old seismic and E-Log data, they should do so.
Finally, if you have a lot of offset info, it can be easy to get drowned in information - make sure that the basics are focused on.
Thanks and Regards