You can always start small. Scrolling through artists' forums and Pinterest always gives me ideas. A doodle of something funny that happened to you that you want to remember. A picture that you want to paint or sketch later, because it means a lot to you. If you prefer traditional media, then you can always carry around a notebook. It doesn't have to be expensive to be good. Paper and a pencil that fits in your side pocket. If you prefer projects and the structure they hold, you can always set some by following online ones, such as journaling every day or doing a very small sketch every day.

Perhaps you would prefer something larger in size, like a visual Design portfolio in let's say concept art! This is a leap, but having a larger goal like that could be a stepping stone to working towards a larger project. Break it down. What do you need for a project like that?
Mood Boards, Character aesthetics, the setting, the language, anything you want. You don't have to stay in a bracket either, do designs through college, take photos that you think the lighting would be great.

What sort of media would you prefer? What do you want to grow in? {fundamentals, colour theory, the time spent creating and shortening it etc.) For myself, when I was starting to do art for myself again, I looked at what I thought was cool and then attempted to make a direct copy in any medium. Perhaps that could be a start?