Dennis,
I administer license exams. We always encourage those who do well on their technician exam to take the general exam. Recently two candidates, who did not plan to take more than technician, also passed the general. Both left in a mild state of shock. Not everyone passes, but it is good practice.
Two numbers to remember:
300: speed of light in millions of meters per second. Divide 300 by MHz and get wavelength. Divide 300 by wavelength in meters and get MHz. Half of the wavelength gives you the length of a half wave dipole, etc. A meter = about 40 inches or about 3-1/4 feet.
7: We have bands starting at 7, 14, 21, 28, and 3.5 MHz. CW and data in the lower part; voice and image in the upper parts. Get the colorful frequency chart from ARRL:
http://www.arrl.org/graphical-frequency-allocations
That will give you another way to look at amateur allocations. I keep a copy of that chart near my radios. I can't remember all those numbers either.
The technician license question pool changes somewhat on 1 July. If you know the material, you would still pass, but
Good luck, Joe, W7LUX