I used to never close tabs and they would accumulate as I kept doing more web searches and other activities. Now when I need to do stuff I usually open a new window instead for different tasks and if I need to free up RAM then I start closing other windows for tasks I’m not doing anymore so it closes all of the related tabs at the same time
For documents I started learning Typst and LaTeX a while ago and now I greatly prefer either of them over LibreOffice. Being able to write comments that don’t render in the PDF is also very useful (i.e. when I do my homework in LaTeX/Typst I’ll put class notes there as well)