Difference between “pou kont ou”, “tet-ou” and “ou-mem”? I think these all mean "yourself".

Yes. You're right.

POU KONT OU
pou kont ou - by yourself
pou kont mwen - by myself
pou kont li - by himself/ herself.
example:
I'm by myself. - M pou kont mwen.
She's going by herself. - Li prale pou kont li.

TET OU

tèt ou - yourself
tèt li - himself.
example:
He killed himself - Li touye tèt li
I'm talking to myself - map pale ak tèt mwen.

OU MENM
ou menm - you, yourself
li menm - him, her, himself, herself
mwen menm - me, myself
example:
It's me! - Se mwen menm!

Ask me anything