1. Buy or gather everything needed for the project and put all parts of the project in a box. Probably it may be a directory on a file system if the project is something digital, but as I love to get outside of displays most of that boxes for me are some real cardboard boxes in the offline world, full with offline stuff.

2. Wake up as early in the morning as possible because evening is never a good time for any projects with uncertain time constraints - because waking up early constantly is important per se. Believe me or not but all my time except of more than 1 year I was an owl and now I realized that this is a key for my productivity.

3. After your morning coffee realize that there are a lot of boxes around. Pick any one and start working! And get ready that most of that boxes gotta be untouched for the sake of dealing with the most important/interesting ones.