I have impulsive tendencies outside of bipolar, but that is also part borderline as well.

I usually have a wish list on Amazon and I put everything I want there. I also print out wish lists for clothes stores. I do find when I'm hypo or manic I get razor-focused on one thing. My husband takes care of the finances so he knows if I'm slipping off with buying stuff. I think my worst impulse now is with eating. I snack a lot when I'm bored or upset.

DBT does help at times because I can stop, determine what's happening, and make a different decision. It also helps by providing tools to defuse the impulses until I'm ready to deal with them.