"I'm just an indecisive person"

After enough laps it's natural to conclude that the problem is you. You say you're hopeless at decisions, as though it were a fixed fact about you like your height.

I don't think it's true, and here's the evidence against it, which you can check. At work you decide things all day. You choose which invoices to query and which supplier to chase, and what to tell the new starter. When your friend couldn't choose between two flats, you listened for ten minutes and said, "The second one. You keep coming back to the light in the kitchen." You were right, and it took you no effort. If you were indecisive by nature you couldn't do that. What you can't do is decide for yourself, when the result will land on you and the blame will be yours.

There's research on that gap. Laura Kray and Richard Gonzalez gave people a choice between two jobs. Some chose for themselves and some advised another person facing the same choice. The advisers tended to recommend the job that was better on the thing that mattered most. People choosing for themselves spread their attention across all the features more evenly, giving weight to minor ones. The researchers found the same pattern with students facing a real choice about their university course. When we advise we pick out what matters most. When we choose for ourselves we weigh every feature.

The spreadsheet called Options works the same way. It has twelve rows, each scored and weighted, and the minor rows get a say alongside the major ones. It's no surprise the totals come out level. If a friend showed you that spreadsheet and asked what to do, you wouldn't look at the rows. You'd ask what they really wanted from the change, and whether they could afford it. That would take ten minutes.

So I'd describe the problem differently. You have good judgement, and you find it hard to apply to your own life, because fear of blame and regret clouds it. That's a more hopeful way to see it, because you can work round it.

The way round is to advise yourself as you'd advise someone else. Write the decision out as if a friend had sent it to you, in the third person, in five or six lines. "She's been in the same job eight years and calls it fine. She's wanted to do this course for three years. They can cover the fees if they skip a holiday. She's worried she'll be no good." Then write your reply to that friend. Most people find the reply comes quickly. It also tends to go to one or two things that matter and ignore the rest. Chapters 14 to 17 build that into a method.