Set the baselines of the highest priority projects and proceed with project plan execution.
Negotiate project changes for the remaining projects, based on your resource analysis. Investigate:
Accelerating the high-priority listed projects using any uncommitted resources in the master resource profile.
Obtaining additional resources to meet the timing and scope objectives of the next several projects on the list
Extending the deadlines for the remaining projects, consistent with freeing up of staff after higher priority work completes
Reducing the scope for some of the remaining projects so they can proceed
Outsourcing some work to increase available staffing
Replanning the work on lower priority projects to reduce resource ...