Review all your projects. Exclude checklists and routines. These are lists that have one-off actions and any administrative work (pay the utility bill, renew subscription to Magazine XYZ, reconcile checkbook register).
I personally like to start by putting every project on hold/paused. Then I look at what I want to work on in the next 3 months. I choose 1-3 projects that I want to focus on. It's a mix. It might be one personal project and two work projects. If it's a really busy time, I'll pause any personal projects and focus on three work projects. The 1-3 projects is a loose guideline. I might go up to 5 projects but that's pushing it. Know your limits and check your schedule for the next 3 months. For example, I know the months of November and December are super busy with my retail job going full steam ahead for the holiday shoppers. I'll pause every project and focus on my holiday season projects - entertaining friends/family coming from out-of-state or starting up the advertising campaign and restocking the sales floor.
It is also a good idea to look at stagnant projects. If I haven't work on a project in the last 6 months, it might be time to just put in hibernation for further review. Why is this project stuck? Are there any more resources I need to help start it? It might be the lack of talent/skill. It might be funding. Or it could be lack of buy-in or interest from colleagues to start up the project. I can either set some new next actions to jumpstart it (learn a new skill, recruit allies, secure funding, etc.) or just drop the project.
If there is a currently active project that I'm working on it, I might look at it from a different approach. Do I need to recalibrate the direction or goals? Did any events change the scope or direction of a currently active project? I'll need to drop any next actions that no longer align with the goals or add new next actions that will keep the project heading in the right direction?
Did a recent event change my focus? I might have a new project that my supervisor just put on my desk and I'll have to pause my current work to focus on the new project. Did I lose focus on a currently active project and I'll need to put it aside for now? An emergency might happen such as natural disasters or a family matter that will change my focus for now.
I can juggle between projects by putting everything on hold/paused and then work on the 1-3 projects I want to focus on for the next 3 months (quarter).