Good strategies. Other strategies are:

-- Move it to Someday/Maybe
-- Make it more doable: break it into smaller steps, make sure NA is defined
as a single physical action
-- Schedule it to a specific time and resolve to do it then
-- Spend small amounts of time on it on a regular basis. Gradual exposure
tends to make one feel more comfortable with the project.

Being able to cross something off and decide it's OK never to do it is a key option
to have available.