Define your goal
Try to negotiate with your manager and renegotiate your annual goals. This also mean to reevaluating your current goals and determine whether it should stay in your list or eliminate from the list. Once you clarified these goals, allow them to shape the focus of your time. Have more meeting that aligned with the related goal and put less time on activities or event that are not related to the goals.
Once you clear with what you need to do with your time, then you need to decide what not to do. It is better to decide what not to do as soon as possible where you no need to feel overwhelmed or embarrassed because of missing some meetings. Step away from as many nice but not necessary meeting as possible. This can include meeting that have interesting message but it is not compulsory for you to attend it or meeting that you can get information with faster format without actually attend it. Other than that, you also need to delegate some of the work to others. Try to delegate some work that others can perform better or knows better where this can save your time and give momentum to the annual goals that you are pursuing.
Make a punch list
It is highly recommended to have a punch list about the important activities that you want to achieve. If there are lots of activities that you want to achieve, at least choose three of them and use all your effort to accomplish them then choosing others. If you still feel struggle finding times for your activities, try to use the first two or three hour to get the job done where these time are just the starting of your working hour and you will feel more energetic to complete them. By having a punch card, you will have the activities or task that you need to complete every day and you will not worry about what task need to be done and what is following next.