Tips for writing dream sequences (from someone who has really vivid, weird dreams on a frequent basis)
My biggest pet peeve with fictional dream sequences is that they make too much sense!! They're too relevant! There's not enough random crazy stuff! That's not always unrealistic per se, but you are missing out on some of the fun ways you can reveal information about your character's mindset, fears, struggles, and future.
Most of my dreams have a goal or objective driving the plot, and it's usually urgent. Ex. "escape the huge storm on the horizon", "find a place to sleep for the night in an unfamiliar town", "find a bathroom". This is especially true of stress dreams.
Everything going on in the dream makes perfect sense to you during the dream. It doesn't feel like reality per se, but you think it is. You're living in a house full of vampires that could eat you at any moment? Seems legit.
Emotions and situations from the dreamer's life can/will find their way into dreams, with varying levels of subtlety. The dream could be about the stressful event itself, or it could be some sort of exaggerated metaphor. Ex. I was worried about whether I was a competent CS major while I was still trying to find a summer job/internship, and I was worried about what my professors must think of me. Such a good student on paper, still without summer plans. I dreamed that I ran into my professors all having lunch together at a restaurant (during a dream with a completely different storyline), and I was wearing my pajamas. They judged me.
Certain things are very hard to do in dreams. This could vary from person to person. For me, it's always driving (the brakes never work right), flying (I can't stay off the ground for very long), and running (it's like trying to run through waist-deep water).
People with PTSD may dream about the traumatic event happening differently than it actually happened. (Take this one with a grain of salt - I don't suffer from PTSD, I just research it sometimes so my blorbos can suffer accurately).
You can have a string of loosely connected or disconnected dream sequences back to back, each with an entirely different plot, setting, etc.
People can have reoccurring themes or plotlines in their dreams, which are often connected to their lives/psyche somehow. I frequently dream about running away from tornadoes and being in situations where there's some catastrophe coming but I'm the only one who understands that there's a problem and nobody will listen to me.
It's common for me to have a dream setting that I KNOW is someplace I'm familiar with, but it doesn't actually look like that place at all. Ex. "I dreamed that we were at my house, but it didn't look like my house..."
Dreams can end in cliffhangers. Sometimes I wake up right before I'm about to eat something delicious.
Sometimes people have dreams about doing things that they would never, ever do in real life, and they wake up feeling disgusted. This is Not a manifestation of their secret desires (*glares at Freud*).
Images are the most memorable parts of dreams. I forget the specific plot points, but I can still picture dozens of liminal spaces my brain has created, even years after I dreamed about it.
Dreams will fade from memory very quickly unless the dream had a strong impression on you, you write details about it down or you tell someone about it before you forget.
If you realize you're dreaming during your dream, sometimes you can control the dream going forward. This is called lucid dreaming. I've done it accidentally a couple times, and it's really hard to "hold on" to the dream and control it. I usually wake up soon after starting. With practice, you can get better at it.
Sometimes a normal/good dream can turn into a nightmare, and vice versa. Most of my dreams aren't really good or bad, they're something in between.
Your subconscious brain is CRAZY intuitive. We can argue over the existence of prophetic dreams (I've heard so many crazy stories), but at the end of the day, your subconscious brain knows things that you don't consciously know. If your character is in love with someone, their subconscious brain will know even if the character doesn't. Relationship problems? Deepest darkest fears and insecurities? Your brain knows. A dream predicted the downfall of my first relationship eight months before it happened, down to the reason why we failed. You can absolutely foreshadow this way. A character might subconsciously know what the consequences of their or other people's actions will be, understand things about the situation they're in, know things about the people they're interacting with, and more, despite their conscious realizations.
There are plenty of ways to make a dream sequence relevant to your story, but don't forget to add in some fun, random details. Character A is secretly in love with Character B? Have Character A dream about Character B confessing feelings to them while in a Vine Nostalgia themed restaurant over a plate of mac-n-cheese. The details are the fun part, and you can get as weird as you want. I once ran into my aunt in a dream, and she was wearing a backpack with a bunch of (fake?) hands sticking out of it, making a fan that rose above her back behind her head like some sort of peacock feather costume piece. I was so freaked out that I woke up. I dare you to get weirder than that.
Not everyone's brain works the same way. I have vivid, random, detailed, memorable dreams on a frequent basis. When I describe them to people they often ask "what were you on?". My roommate only remembers her dreams when they're nightmares. I have some friends who say they don't dream. Other friends have really boring, mundane dreams about their normal lives. Some people have weird dreams but only once in a blue moon. It's a good idea to decide off the bat what kinds of dreams your character has, and how often they remember them.
That's it for now, but I might make a part two if I think of more things to add. Feel free to reblog with your own personal dream expertise!