Over the years, I've trained myself to edit clauses like "I think..." or "I feel ..." out of writing (almost entirely) and even out of conversation (not quite as much). I've also passed this approach onto pretty much anyone I've ever proofread.
Simply put, when these phrases are omitted, people agree with me more, and I like that. The implied uncertainly or emotion in saying you're 'thinking' or 'feeling' seem to act as live bait for a certain type of negative argumentativeness that doesn't raise the level of discourse.