This is only part of your question, but it is useful for me. When I think I am close to making a big decision, I consider it made and then I walk around with it for a day to see how it feels. This is especially important when there are many feelings, excitement, fear, anticipation, worry and it is hard to distinguish them.
For me however, it doesn't work to walk around with all the alternatives at once. I need to feel that one possibility has been chosen, and all the others closed off. Then I can see whether or not something important is missing.
After a day or so I usually know very well whether to go forwards with the decision.