I've tried, but I'm more of a serial monogamist. If I stop working on Project A to work on Project B, I typically work on B until it's finished ad then return to A.
Intriguingly, I've found that sometimes if I've stalled on Project A and switch to B, I unconsciously craft B to tackle a skill I need to master before I can continue working on A. So it's useful, but I can't multitask.