If you are looking for an undergraduate degree that will help you earn a strong salary, think math. If you want to avoid some of the lowest paying fields, reconsider degrees related to children and food.
Payscale’s survey of college degrees by starting and mid-career salary puts engineers high on the list, comprising much of the top 25 (below) based on starting salary:

1. Petroleum Engineering
2. Aerospace Engineering
3. Chemical Engineering
4. Electrical Engineering
5. Nuclear Engineering
6. Applied Mathematics
7. Biomedical Engineering
8. Physics
9. Computer Engineering
10. Economics
11. Computer Science
12. Industrial Engineering
13. Mechanical Engineering
14. Building Construction
15. Materials Science & Engineering
16. Civil Engineering
17. Statistics
18. Finance
19. Software Engineering
20. Management Information Systems
21. Mathematics
22. Government
23. Information Systems
24. Construction Management
25. Environmental Engineering

Payscale’s more comprehensive list is available at: http://www.payscale.com/best-colleges/degrees.asp
The Wall Street Journal also provides interesting information relating to careers and college majors:  http://online.wsj.com/public/page/rankings-career-college-majors.html