For motivation: I drink a fruit smoothie and eat some form of protein because they give me the energy to be productive (I do not touch any junk food on days when I need to be productive because I will instantly lie in bed and do nothing if I do.)

For stress: I turn my phone on silent, put some essential oils in my diffuser, turn off the lights, lounge in my bed under my weighted blanket, turn on my neck massager, and listen to a 20 minute meditation on Headspace for whatever is stressing me out. (I have invested a lot of money in my mental health lol.)

Cheaper alternatives I used before I got all of that: scented candle instead of diffuser, several layers of blankets and hugging a stuffed animal instead of a weighted blanket, and free meditation available on Youtube

This may not work for everyone, but just taking 20 minutes a day dedicated to destressing has helped me a lot.

Well,if you help me too,I have a really big motivation problem!
For inspiration you should listen to music,maybe pop or epic music,also,good is to go out look at the nature,or at night the star's!
For stress (Well,that's hard even for me)
You could put headphones and listen to delta waves music,or
Watch satisfying videos,or watch some movies or series to give you inspiration!
And,don't worry be happy!

Budget your time. Break up the big things into littler things. Rather than saying "My room is a mess- I need to clean all of it", say "My room is a mess. I'm going to spend 15 minutes picking up the laundry off the floor." and progress from there.

Surround yourself in things that give you ease. For me usually thinking strongly of my mascot Shiny always gives me a smile. I never stop daydreaming of all the fun there might to be had for him yet with his big dudes. ^_^

The advice for others here I would say i agree with Kitty, sorry i got nothing new to add to em :o
do take care! *hug* <3