1) Get community service hours that involve alleviating others' distress (food bank, housing rehab, job/tax/social assistance, shelter volunteering, transportation service). Your museum work is an extension of your academic competencies and not service orientation.
2) Shadowing in primary care would be nice.
3) As mentioned in a different thread, look for research opportunities. Keep doing well in classes to make it easier for faculty to think you actually know enough science to understand working in labs.
4) Seriously get a plan to study for the MCAT. We have the study plan.
5) Start documenting everything (Premed Planner app) so that it makes things easier to write up for your AMCAS W/A section.