Kit bashing.
Scratch building.
RMwebing.
LNER OO gauge.
Some LMS and GWR.
Building exhibition layouts.
Long walks in the snow at night.
Throwing rocks at campers and avoiding humans with cameras.
Oh, ok, I have an idea, read a thread on here which has 100 pages and read every comment, then you should be able to fall asleep after that. Works for me. LOL