I like to do preliminary drawings. For years I filled sketchbooks with drawings and some became paintings and some did not. Now I have an iPad and use a program called Procreate to do my drawings. The iPad was a gift from my family and I have enjoyed using it every day.
Regardless of where I do the drawings they are where I work out my design problems. I decide where my focal point is going to be and where the darkest darks and lightest lights are going to be. With Procreate I can duplicate a drawing and then play with color, deciding the palette I want to work with.
The drawing allows me to paint the painting in my mind. I do my drawings in the evening. The other plus of the iPad is that though I do have a lamp beside me the screen is light enough to see exactly what I am doing (so I can sit in the same room where my husband is watching TV).
The next morning I do my "get ready to paint dance" arranging brushes, getting clean water, lightly sketching the outlines of the drawing on my paper, making sure there is plenty of fresh paint in the palette, wet the paper and paint.
Repetition forms routine and when you find something you like it is easy to repeat it. I have worked my way through gallons of paint and reams of paper. Not all have been wonderful but all have been instructional. Hope you find your routine that brings you joy.