How do I get better at financial projections for DCF?

hi,

I've recently been picking up the basics of DCF as a way to value stocks and I'm clear on the details that go into the model. A big part of the model comes from the assumptions in revenue / expenses / earnings projections into the future.

What can I do to get better at making rational financial projections?

Also, where can i get more details about analyst financial projections into the future (and even their reasoning behind these numbers if possible?)

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Thanks!