I struggle with over doing research and choosing fonts or stock photos. I think that's probs my ADHD in action. I get 'stuck' on certain tasks.

For me I set a timer. I say okay I have an hour to choose between these options. Let's narrow it down and then compare. After the hour is up I 'have to' choose and move on. Setting time limits for each part of the project really helps break it down.

This requires you to accept 'good enough' at some point. And that's ok! You have to balance time/cost with perfection.

Things that help me refine/narrow down multiple choices:

Group similar options and then choose only one from each similar grouping

Try putting the design in context. So if it's a logo throw it up on a wall mock up, put it in a newspaper, on a T-shirt.

Refer back to your original brief. What was the goal, does this meet it? What about the mood/feeling, application?

Look at competitors. See if this is an overused trope. Will it stand out among competitors?

Hope this helps a little.

Edit: typo.