Brake the project down into small projects.start on one finish it then on to the next one.I get a note book w/ differant sections each section of the note book is for a differant parts of the car.chassis sec,body sec, suspension sec, motor trans sec, trim sec(bumper,grill etc. paint and body sec.start out making notes of ideas,parts wanted suppliers,part#'s.list of things to do,(each job on it's own line. I list the parts I have already have and the ones I need and there cost.Let's me know where I am at in the build cost. My two cents worth.
