(Melting ice.)
Other types of necessities (in conjunction with putting frozen liquids and warm areas): child, oneg Shabbos, etc.
using Post-It notes, Scotch tape, adhesive notes, etc. on Shabbos;
Understanding Meraked When Straining Liquids and Solids;
The difference between one letter or two letters; writing with a "SHINUI" (not the usual manner). One letter on top of another letter.