Sometimes, when I have a large project, I do a big chunk of it then put it away. Later, when I feel ready to tackle it again, I start where I left off. I find, though, that this system can be more difficult to work with. Sure, I'm happy I left the project to work on something else, but, it seems to take me a long time to bring everything up to speed once I come back to it. I haven't quite figured out how to fix this. I guess the bottom line is, no matter which way I operate, at least I'm getting the thing done.