I've often thought ( but haven't yet done it) that a running sheet, sort of like a job sheet would be a handy thing to keep on the car. The last ten minutes while you're winding down after working on it , or even at those times when you have an idea at a time when you ain't working on it you've got something to record it on . Write down what you just did and why, write down random thoughts you have about problems you are trying to solve or about decisions you are trying to make...it can't hurt .
I could have built a car in the amount of time I have stood out there in the shed , by myself, staring at it ....small fractions of that time are filled by productive thought...which I don't record . Most of building the car is in fact grunt work , the difficult part is organising that grunt work...
If I wrote down the ideas I had and spent time thinking about them somewhere where I wasn't distracted by the visual of the car and then made decisions about what work I was going to do I could then stride out to the shed AND GET INTO IT..............
Last week I got tired of feeling like white trash and decided it was time to move my unregistered EH Panel van from the front lawn....I put it in the drive behind the gate , two hours later I had the motor and box out , started a clean up underneath and given it a general look over to decide how little I could get away with to get it roadworthy again .This week I've set up a molasses tank to de-rust some stuff and got most of the things done I needed to do in order to do the gear box swap it needs . In short, this kind of stuff is easy because you know what you have to do , it's grunt work.
With your race car work out what you HAVE to do in order to race it. Connect these jobs through the shortest possible route on your white board to the bit where it says DONE . There is nothing surer than the fact that you will be pulling it apart time and time again ...take note of things you'd LIKE to do and do them when they are practical to do. I was also thinking this morning that in hindsight we could have saved money by having a "wish-list" of quotes on pieces we needed.....
I'm genuinely embarrassed to admit that progress has been glacial at best.
your embarrassment would be dwarfed by mine if I had to accurately account for all the money we've spent , and justify it..
This is coming from someone who has spent four years in the mortal fear that i'd got involved in something that might break my heart , my bank , my spirit or all three simultaneously AND at the same time.
BTW , and you think you've got a yard full of ...stuff

...few understand what I'm trying to do , but they vastly outnumber those who understand why..