Get in the habit of ALWAYS using a paper check-list. Keep
your thumb on each item until that item is confirmed. This
is what the PROS do.

The pros more often than not have another guy sitting there so they can
run a proper challenge-response style checklist. Those of us who fly
single pilot have to make compromises, and not always being able to run
the checklist except from memory or via flow patterns is one of
those.........