Make a film that only serves as a vehicle to further your career.
Pre to post production is a long journey. You will ask yourself (probably more than once) "Why am I making this wretched thing again?". The more invested you are in the heart of your story, the easier it will be to finish what you started.
Let money and resources, or lack there of, stop you from moving forward.
While making a film usually requires some money it doesn't necessarily mean you need an absorbent amount to make this thing. With that said, don't try and make Transformers 5 (what number are they on now?). There are incredibly talented film students who are willing to work for free so they can gain experience. They usually have access to professional equipment as well. If you love a certain location but it would cost to film there, maybe offer to make them a promo video as payment. There are loads of creative ways to keep costs down. But if you REALLY have to make Transformers 5, there's always things like Kickstarter to help you raise money. Don't let money stop you.
Lose your vision.
You will have lots of ideas. Make concessions where you're comfortable but when you're dead set on something, make sure you do it. Sure, filming at night, in the rain, with minimal lighting and no outlets is a bad idea BUT if it's important to you and you're willing to find a way to make it work, it's totally worth the extra effort. Where there's a will there's a way. Even when it's a stupid will. Also, try and assemble a crew that is open to "crazy" ideas. It makes things a lot more fun and collaborative.
Exclusively ask Google how to make a film.
Making art is a vulnerable and personal process. That and being a novice film maker makes for many a restless night. You're in uncharted territory; you're exposed. Ask other human beings for their opinions anyway. Believe it or not, Google still lacks a consciousness. I resisted asking for constructive criticism on my script for forever. That was stupid. The eventual input that I received took my script to a better, more complete place. I also asked trusted and experienced friends all sorts of questions ranging from practical things like - "How do I organize a shooting schedule?" to embarrassing things such as, "So when we all show up on set.... what do we do?". You can keep things close to the vest but reach out to trusted peers who can help you see the blind spots along the way.
Nearly burn down your flat with a prop fire.
No further explanation required.