Here is a great article in the Wall Street Journal about verbal “tee-ups” as prefixes to statements.  They say it is a sign of insecurity.

“To be honest…”
“I want you to know…”
“I’m just saying…”
“I hate to be the one to tell you this…”
“I’m not saying…”

I think they are right on all counts and, furthermore, I confess my guilt.