When determining your 4th year schedule, there are a few things to consider. The first is how many away rotations you will do. If you go into a competitive field, you will need a few away rotations. That is fine.
The big mistake many medical students make is choosing elective rotations in their field of interest. That is what residency is for. Use the rest of your 4th year to explore fields that you will never get to see again. You will be a better, more well-rounded doctor for it.
Next, don't make 4th year too stressful. Choose fun, relaxed rotations where you will learn something new. For example: I've decided to persue child & adolescent psychiatry. A few of my electives were radiology, sports medicine, emergency medicine, etc.
Last of all: enjoy life. Intern year will stress you out enough.