1.) Place every New object you have at least once. Go ahead and visit new themes too. I'm not sure if this helps, but you may as well experience and play around with all your new tools while waiting, because there IS a waiting period between unlocks. Bear in mind that while the unlocks ARE still locked by a period of playtime, IDLING WILL NOT WORK (or is at least less effective). Just actively mess around in the editor while you wait, that's why you bought the game - it's freaking fun.
2.) Eventually, you'll get a message saying new tools will be available on (tomorrow's date). But we won't stand for time locks, will we?
3.) Place a large square of blocks. ? Blocks, Brick blocks, whatever you feel like.
4.) Hold L to enter Multi-Grab Mode and highlight the biggest chunk of Blocks you can.
5.) Hold ZL to enter Copy Mode and Copy these blocks everywhere. About 5 times might do it.
6.) Release ZL. You should hear truck noises, followed by an early shipment unlock process.
7.) Repeat until everything's unlocked ;D