Do multiple projects. I'll get tired of one project and move to the next one...then onto a 3rd one, before going back to the first one. Maybe start with something small to get you focused. Don't forget, you can do everything you listed - even all at once. The hard part is to just get started.
There are times I'll get started on something and it morphs with a life of it's own that's different than my original idea but still similar enough and still enjoyable.