Motivation is always a concern.  My suggestion is to just sketch out some ideas on both the new stuff and the old stuff and see where that leads.  Don't worry about a finished product look, just get your ideas down.  I think many times we worry that we will lose track of an idea or story line so while we concentrate on not losing that idea, we come up short on finishing some of other more established works in progress.  

In any case good luck and keep at it!  DDK

I have the same problem.  What I do is write a chapter or a certain amount of words on the work in progress, which would be L&G or Nemesis for you, then reward myself afterwards by working on an idea or story that is new or fun.  

Ditto kinda.

I feel you, I really do. What you say has a relevance to more than just writing. We do this sort of thing because the new and shiny always seems to draw attention. The new is less complicated somehow and therefore, easier to deal with. Although it could be, it isn't necessarily so and could be just as hard, or harder, to work on/with as something older. Remember, L&G and Nemesis are old friends and deserving of attention and just as it is when you make new friends, you can't neglect the old ones and expect them to still like you when you find the time for them. Having now been neglected, it's going to take some work to get back those relationships. Believe me, they are worth it and you know it. That's why you're thinking about them, because you know they are still good friends and deserving of your attention. Now you just have to work on rebuilding the relationships and if they begin in starts and fits, that's okay. As long as you continue to work on them, you will come together eventually.

Thanks, you guys. That's a lot of helpful advice.

I don't know if I can add much, but for me I have to reread the ongoing stories to motivate me. That gets me into that mindset and I start remembering them again. It is a little embarrassing but I reread my work over and over. I fall back in love with them and can't stop thinking about them. There is my two cents. Sometimes we need to try lots of things to wake up the muse. When he falls asleep, he isn't easily awakened.

I do tend to reread what I've written a lot. Sometimes it helps, sometimes it doesn't... Guess I should give it a go again.