Some other tips:
:g/foo/d " delete lines containing foo
:v/foo/d " delete lines NOT containing foo
:g/^$/d " delete all empty lines
da( " delete a pair of parentheses and content
di" " delete inside quotes
da{ " delete a block with braces
d2ap " delete two paragraphs
dtX " delete until character `X`
dfX " delete through character `X`
dT/ dF " same but backward
2/3
#Vimovember #vim #neovim