Incidentally, in textspeak

• "I almost forgot . . ." in texts
• Texter's "just so you know"
• "Oh, I forgot to mention," in a text
• Texter's "Oh, and another thing ... "
• "Oh, and did I mention ...," in netspeak
• "While I have you ...," in a text
• "b4 I 4get..."
• "Oh, also ...," in a text
• Texter's afterthought intro

Wiktionary Word definitions in Wiktionary
abbr. (alternative spelling of BTW English)