When a project only gets bigger and bigger

I did not know how to title this thread. But, have you also been in a situation when your car project only seems to grow? I'm at the point where a lot of things need to get done, but I dont know what I should be focusing on first. So I work a little on this and a little on that, feeling I'm not making any real progress. I should probably make a plan and a list and stick to it. Any good ideas?

Things that need to get done:
- Installing new carpet and the seats. Paint the floor before doing so and also painting some interior parts
- Finish refurbishing the dash and instruments
- Finish refurbishing the grille
- Finish my spot repairs and paint and clear them. Colorsand and polish etc
- Paint and install hood scoop
- Finish porting the heads, have them milled and lap the valves etc
- Putting new cam in the 360, put it back together and paint the engine
- Take the 273 out of the car, clean the bay and paint it
- Install 360 in the car
- Installing 3.73 gears in the 8 3/4

It might not look as much, but it takes time and sometimes it's hard to even find the time to work on the car. I'm still enthusiastic though, so that's not a problem.

How would you go about getting these things done, what order?