Bad Decisions

Hello everyone, it's been a while since I posted anything on here, but I would like to ask if anyone else has problems with decision-making, and, more to the point, making bad decisions over good ones?

In the past I have had a tendency to make hasty decisions, especially regarding personal relations, which has left me with no face to face friends, although I have been friendly for a number of years with people online, which admittedly I feel far more comfortable with anyway.

In addition, I have tremendous problems with decision-making in regard to finances. In the past I have probably wasted hundreds of pounds on hobbies, especially music, only to give them up soon after, often selling, or just throwing away the items I have boought.

Does anyone have any coping strategies they use to stop themselves making impulsive decisions? I would be very grateful to anyone who can give me any advice.