I'd like to say that I still have some things left to be done.
The first thing that comes to mind (probably due to my native tongue, Hebrew):
What is left to do, is to clean up the mess.
But it sounds bad, and I'm sure it's incorrect. The following sounds a bit better to me (although I feel it's probably wrong):
- What's left, is to clean up the mess.
- What remains to be done, is to clean up the mess.
Are any of the above correct? Is there a better way to say it?