Last week I started avoiding the word "but" in all my communications. It's harder than you'd think. I'd thought I could just replace it with "and" but and that just doesn't cut it. Sounds weird. It requires a total rewrite of every sentence you put to paper and forces you to think constructively.
No: I'd love to come, but I already made plans.
Yes: I'd love to get together with you some other time. I have plans that night.
No: I would have finished, but it was just too much work.
Yes: My bad. I'll finish it now.
I highly recommend it.