Cool guide! I overexcessively use lol, I really need to stop doing that. Umm some others I use are
idk=I don't know
ik=I know
yw=you're welcome
jw=just wondering
nm=nothing much
jc=just chilling
lmk=let me know
fyi=for your information
tmi=too much information
gmta=great minds think alike(I barely use that one)
gr8=great
that's as far as I go. Haha, some people really overdo it.