First off, congratulations on having a rich and varied creative life! Rather than a "problem" try to look at it as a gift!!!
There's a lot we do in life that really is an art form but it's so normal for us that we don't see it that way.
For instance, putting a meat-potatoes-vegetable meal on the table, all at the same time and all hot seems to be in the realm of fantasy for so many folks nowadays. My grandkids live at Burger King and when they visit I make sure to have a "real meal" for them. When they sit down at the table they just stare at the dishes of home-cooked food as though it were the Mona Lisa!!! Then they dive in, but for awhile it was art!!!
So maybe make a list of all your true "art forms", just for fun!
As far as your more obvious art forms go, I'd suggest doing what moves you, either by inclination (I really want to knit this gorgeous sweater!) or necessity (I've got to get hems in these jeans or go naked to the store!). Then practice FINISHING projects. In the immortal words of Larry the Cable Guy...... "Git 'er done!". There's a great deal of satisfaction in that. It gives you a useful hand-made item and clears the decks for new projects.
And last but not least, ORGANIZATION is the key to production!!!
Keep your tools and materials within easy reach. If you have a separate area you can use for your creative projects use it and use it efficiently.
Anything you have to hunt for or wrestle into place (like the sewing machine) will cut down on the time you have to create your projects and also on the willingness to get started. If you know you've got to fish around in a closet for the sewing machine, set it up, re-thread the needle, get the extension cord to hook the dang thing up..... you get the idea. It can be exhausting just thinking about it.
If you have to keep your items stored away, put them together where you can reach them at a moments notice. Label all bins of materials with what's inside and if you have a lot, make a master list so you can look at it and know your sock yarn is in Bin #32 and your acrylic afghan yarn is snoozing in Bin #12.
Anything you do to keep your area orderly will buy you tons of time to work your magic. Just put it together with the idea that you want to be able to go there, sit down and immediately start working on your project du jour!
Then be sure to put it all away when you're done!!!
Good luck and hope this helps!