Writing on a rainbow
If you're trying to get into a regular writing habit but you keep running into the 'yes but what do I write about?' problem, you need a few prompts up your sleeve. Colour doesn't work for everyone, but you could give it a try. Specifically, try writing on a rainbow.
Conveniently, there are the same number of colours in the rainbow as there are days in the week, so you can match one with the other and never have to think too hard about a prompt again. You might go with:
Monday - the red light district
Tuesday - orange squash at a church fete
Wednesday - the lemon sweets that always get left till last
Thursday - the smell of fresh-mown grass
Friday - bluetits jostling on a garden feeder
Saturday - a school exercise book with deep purple sugar-paper covers
Sunday - crystallised violets on a birthday cake
Or another week might be:
Monday - scarlet stilletos
Tuesday - a vibrant sunset
Wednesday - washing-up gloves
Thursday - a green velvet ribbon
Friday - a lake on a calm sunny day
Saturday - someone coming home with a black eye
Sunday - a purple front door on a street of white uPVC
Either try 5 minutes' uninterrupted writing and see where it takes you, or jot down all the ideas each thing makes you think of. You might get a colourful surprise.