I most strongly recommend color coding your wiring. Even if it is a small layout, you want to eliminate anything that will delay or prevent you from running changes. Even by my standards, I'm a little extreme in this regard. I have 8 power districts. They all use Red/Black pairs for track power, but they are all tagged with colored cable ties (one for each district). Track feeder wires from each Red/Black track power pair will get a label with the District Number & Terminal Strip Position (really a feeder number). I have another page of the spreadsheet with each feeder's location and number noted.
Here's the wiring conventions in place on Panhandle 2.0. There are also two 15VAC accessory buses - details TBD later which I have not shown.
George