AFAIK - As far as I know.
AFAIC - As far as I'm concerned.
FWIW - For what it's worth.
WYSIWYG - What you see is what you get.
FTW - For the win.
FTL - For the lose. (loss)
IMO - In my opinion.
IIRC - If I remember (recall) correctly.
"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"