There is another eruv. Eruvei Techumin that permits one to travel "beyond" ones techum on Shabbat. This is a short intro to techum and eruvei techumin

There are certain domains that are private domains on a biblical level but that the rabbis prohibited from carrying in. This is a short introduction to those.

This introduction will cover partitions and what invalidates them

Short intro to Eruvin and the 4 domains that will feature

The final two mishnayot of Masechet Shabbat continue to discuss various cases that could involve excessive exertion

These mishnayot discuss significant effort regarding feeding animals on Shabbat.

23:5 deals with halachot of how to deal with the deceased on Shabbat. 24:1 discusses what to do if Shabbat is approaching but one has not reached their destination yet

These mishnayot deal with applications of the law prohibiting dealing with weekday affairs on Shabbat

Borrowing food and hosting meals on Shabbat

Drying oneself on Shabbat and other laws relating to treating ones body on Shabbat