Ask HN: How do you choose the best idea to focus on?

[Biba]

I have 4 different ideas in 4 different niches that can disturb those spaces. I'm testing it through customer development and pre-selling it. How do you manage to be focused only on one idea if you see 'sweet spots' in other ones too?

[ponyous]

I have all of my ideas in excel with columns:

Time Needed, Enjoyment, Potential Income, Career Impact

I score all ideas in all categories, and then I have my own formula which tells me which idea is worth it.