Here are a few common acronyms used in e-mail that you may find useful and sometimes quite clever. Caution - make sure the person receiving your e-mail knows the acronym and won't think it's an insult.
BRB - Be right back BTW - By the way CUL - See you later F2F - Face to Face FWIW - For what its worth FYA - For your amusement FYI - For your information GMTA - Great minds think alike HHOK - Ha ha only kidding IMHO - In my humble opinion IOW - In other words LOL - Laughing out loud OIC - Oh I see SO - Significant other TIA - Thanks in advance TNX or THX - Thanks WB - Welcome back WRT - With respect to WTG - Way to go