What age is toddler? What are the things you find hardest/easiest to manage? I am now 30 weeks into a difficult pregnancy, with a 3 year old, so my exp may or may not be relevant depending on your situation.
I hope you're cutting severe corners on housework etc. - get takeaways etc. will cut down on washing up. Kick mess to the side of the room and ignore.
Cut up bits of paper and stick them on another bit of paper. Also stick pasta etc.
Make and then play with playdough. Or failing that mess - spray shaving foam on some baking trays. Let him stand up at the sink and run water into unbreakable things (rules are tap stays over the sink at all times. NO plug usage and you have to be compos enough to be able to grab him or the object if anything makes water spray everywhere)
Open a cupboard he's never seen before and allow trashage.
Go out if you can.
Playdate with understanding friend (let your house be trashed on the proviso that friend does most of the running-to-see what that crash was type effort.)
"cooking" - get shop bought cake or biscuit and a huge array of cake decorations (non chokable if he's little), plus a bowl of icing or melted chocolate. Accept that your DS will basically just eat it all, but will hopefully take a long time over it, and will be relatively static while he does. Good teeth brush and slow energy-release food for tea, he will come to no harm.