For me it's:
Gliptone the leather
Replace the tread rubber screws
Swap the indicators to clear lenses
Touch up the chips
Replace the mirrors
Replace the petrol cap
Clean all the sparkly bits
Deep clean the wire wheels
Oh, and drive all through the Winter.
That will keep me going until next Spring...
Something along those lines for me but not exactly.
I have alloys, nice little filler cap, clear lenses.....
I will finish off cleaning/undersealing the underneath...just chassis left to do.
Tidy up headlamp chrome surround(paint a la ARP4style or replace).
Reseal hood seams/front top of windscreen areas.
Replace exhaust clamps due to corrosion(preventive task).
Fit a power socket/USB under the dash to replace the one in the glovebox.
Some possibles are
Steering Cowl tidying as per StewartS.
Valance/airscoop to improve airflow to rad (fan cuts in fairly regularly in summer).
Headscratch on how to get cooler air to the intake. It gets very warm under the bonnet! Not much room for ducting!
Get out as often as possible for drives.