A few tips I've discovered while playing:
Ctrl+Shift+tab to switch between Sims 3 Camera controls and Sims 4 controls. This is especially useful when in build mode and trying to rotate objects outside of the 45 degree rotations. I tend to stick to the Sims 4 controls when in live mode.
You can press and hold "alt" to move paintings/wall decorations/windows/etc. around the wall now! That's fantastic!
In the needs panel you can click on the little icon next to the needs to fulfill the respective need. For instance, you can either click on the fridge and go through many clicks to find the right meal or just click the little icon next to the Hunger need and they'll feed themselves automatically. Be careful about this for things like using the bathroom as I think sometimes they'll walk in on another sim
The ability to bulldoze the entire lot while in build mode. No longer necessary to exit the household and go to the map view to do so.
Pressing "M" goes into the travel screen automatically. The sim you have selected at the time is the one who goes travelling, though the game also gives a prompt to see if you want to invite other sims out as well.
In the options menu (under Gameplay) there is the option to return the "traditional social menu" which is my preferred menu of choice, as mentioned in the post above.
When taking a sim out to a community lot and you leave someone home who decides that they won't go to work, instead of switching control to that sim (and going through the loading screen), just have that sim come to the community lot and then send them off to work there. I was kind of annoyed when I didn't realize that and I went back to my home lot twice in order to get sims off to work.