There are always a bunch of threads on here asking for advice for new lone parents. I thought it would be good to bring together some of the most useful info in one place. Feel free to add!
Everything that you learned the hard way/were so grateful to have been told/wish you'd known in the beginning. Ok I'll begin...
You can get free legal advice from a solicitor for 30 mins. You can go to more than one! Wikivorce also has heaps of information. Use it!
No is a complete sentance. Use it. [MN classic advice, to be fair].
Bread and milk should ALWAYS be in your freezer, because you WILL run out and not notice until the kids are in bed and you are unable to shop for more.
Clean houses are not a thing. Lower your expectations immediately and go for hygenic, not clean. You'll be happier. So will your kids.
... anyone want to add more? :)