What sparks your creativity?

Exact same problem here.
Although, my work starts suffering from having so much work.
No peace of mind, destroys a lot.
And often, people around you who don't understand will only amplify the effect.
Find the roots of the problem and cut them. Also get away from the negative people. Get some rest till you feel so bored from it. Then you could do something you like. Till eventually idea's pop up in your head.

Good Afternoon Juzek (and ALL!).
This is what works for me, try what you want and purge the rest.
First for me, I can't rush the creative process. If you rush it, the product will never come out the way you want it, it will frustrate you that much more and you have wasted time, energy and maybe broken something in frustration.
Second for me, when I am good to go, I make sure my background helps feed the creativity. Example, I am working on few games, I am working a WWII navy board game so I don a WWII captain's cap, I am working on a modern navy flight board game so I don a aircraft carrier flight deck helmet and I am working on a 1850 trooper/cannon/horse board game based on Iron Maiden's song the Trooper so I blast that as I write... is it silly/dumb? Absolutely! But it works for me
Third, when the fires of creativity die down, walk away from it. Go for a walk, go for a drive, take a nap, think about something else. Take a notepad with you though or a small recording device so that when you have a flare-up of creativity you have something to write down the idea. Too many ideas have been thought up and lost because I thought "I will remember" that. I never remember.
Fourth, This is your game/process, don't allow anyone to ruin it for you.
Dano
Radar Lock Games

Sitting in my room, wondering why I'm not doing anything worthwhile, rarely shakes me out of a funk. So I put myself in motion, mentally or physically.

• I walk or bike in nature.
• I grab a random book off the shelf, and sit in the sun with it, skimming until I find an interesting chapter.
• I reach out to others in some way, and ask for input.
• I use random generators I find on the Internet.
• In all things, have accountability - and a deadline - to finish. It's either made for me, or I set it up myself.
• Once you are working, put away the smartphone. Literally: take out the battery and put it in a drawer for two hours or whatever.

For a while now, I've been making video games based on random factors and restrictions, or I request criteria from others, and use those as the main guidelines for the work I make. Maybe it's the place I'm in mentally or emotionally, but I've found that I've finished two video game projects earlier this year, which I find to be my best works yet. Both of them were the result of someone else giving me guidelines, and then me applying my abilities and discipline to those guidelines.

The fact that I received random input helps jar my mind out of its rut. Then the fact that not only am I'm making something for someone else, but that I have a deadline to complete it, forces me to do a part of the project "good enough" and then move on, instead of obsess over perfection.

Oh, and I strongly recommend you read the books The War of Art by Steven Pressfield, and Atomic Habits by James Clear.

This is a great questions and everyone finds creativity from different sources and experiences. You can't control WHEN you will be creative, but you can control the TIME you give yourself during the day to experiment, create, ingest, and let your mind be open and focused.

If you sit down and think "Now, I shall be creative!" there is this immense pressure that if you aren't creative in this time, then you've failed. Visiting new or influential places, talking to people, and seeing prime examples of what is already out there can all spark creativity.

Take notes or sketches during those times and apply bits and pieces from all those moments and experiment with them during the time you give yourself to tinker, sketch, or whatever you might do. This can be helpful so that you don't have to remember all those things you thought of the other day and will hopefully relieve some of the pressure, especially when there is a financial burden.

I hope this helps and good luck!

Yes! Always having a notebook with you is an amazing advice.

Agreed. Although my notebook is just my cell phone. When I get an idea, I send myself an email. It sits in my in-box until I have time at home to deal with it, and then it becomes a more fleshed-out discussion in my folder full of game design notes and ideas.

Check out lulu.com. Not sure if you have heard of this website. My friend got his book Grimmgard put together on this site.