Weather permits. What must each pilot do, whether under IFR or VFR?

1. 1Watch for other aircraft and avoid them
2. 2Fly only on headings that ATC assigns
3. 3Use radar traffic advisories at all times
4. 4Fly only above 3,000 feet AGL

Source: 14 CFR Part 91, § 91.113 Right-of-way rules: Except water operations.