"These are my thoughts, you can take them or leave them"
"Here's what I think, do what you will"
"Do what you will with my input"
"Its only my idea"
With the first three, what I do with the idea is flush it, usually before the individual is finished speaking. If someone can't own their thoughts, I have no interest in whatever comes after their qualifier.
With the last one, I want to jump up, grab the individual pitching and scream, "THAT'S GREAT! ITS ONLY YOUR IDEA! YOU DON'T HAVE TO SHARE CREDIT WITH ANYONE!" Fortunately for my colleagues and clients, I have restrained myself so far.
Instead of enhancing your idea pitch, qualifiers communicate your lack of belief in your idea to your audience.
If your idea is well thought out, your pitch doesn't need any qualifications, you are qualified to pitch already.