Yeah what the others have said.
After doing this for so many years, and constantly working on multiple projects at the same time, I can only say to you Vicki, it won't be a problem keeping tracks sorted once you've done it over and over again. You'll get into some sort of habitual strategy regarding your workflow and after that you need just to evaluate the efficiency of that said workflow from time to time and you'll be on the right path.
The danger lies in getting stuck in the workflow on stuff and parts that aren't necessarily important then and there. What I mean is, here's an example, don't solo the vocals early on and try to make 'em sound perfect when nothing else is done and you don't have a clue on how the song even sounds when all instruments + vocals are up and running.
Before I even start working on any track, I go for balance. I set faders (volume) on all tracks so I get an idea as to where I am and where I wanna go.
Then I implicate about the same top-to-bottom strategy but with a slightly different approach as to what I'm focusing on and in what order.
Since I dabble mostly in folk style music; I, at least for starters, use the top to bottom strategy but my primarily focus goes as follows:
1 - Vocals
2 - Acoustic guitars
3 - Electric guitars
4 - Bass
5 - Drums
6 - Fillers (Guitars, Harmonica or other instruments)
Like Boydie, I deviate from this more often than not, but that's where I try to start every project I'm working on.
There's so much more to say but it's at least something for now.
In the end, if it sounds good no one cares about how you got there. It's so easy getting caught up in how it's supposed to be done, but it is more important...to get it done. One way or the other! Don't forget that!
Hope that helps!
Cheers,
Peter