Grant mentioned sharpening your eraser.
When I did drafting on paper, I got an erasing shield, like this:
It’s great for erasing tiny areas.
Also a drafting brush, is great for brushing eraser crumbs off the paper, without smudging, and it’s very quick. It’s surprisingly helpful.
I also tested a bunch of erasers, and the Steadtler white eraser, worked better than any others I tested, and difference was quite noticeable. And getting it in a tube, allows you to erase smaller areas easier. Combined with an erasing shield, you can erase very precisely.
If you are working on paper, these really help.