Another tip for pallor: Get plenty of sleep/use eye drops and have your teeth whitened. The whiter the whites of the eyes and teeth the more contrast between them and your skin tone, this contrast can sometimes mean the difference between looking light skinned and looking ill.
Also, is your hair the right shade for your skin-tone? I bleach my hair blonde and as a pale person I find too much of an ashy tone or even brassiness can really wash me out.
ETA: If your skin naturally tans well and you suit it, there's no reason why you can't sunbed. From pale you will need to start out on low time and gradually increase the time in the bed after you have built up a base tan. I think this is preferable to sun-tanning outside as you can control the amount of exposure and unless the technician at your salon is a retard you'll never burn. It will also provide you with a little natural protection from the sun for when you go on holiday, and will only need SPF15 while in spain and should be able to deepen the tan further while there.
Wikipedia lists these causes of pallor, so anyone who has become unusually pale you might want to check through them.
Possible causes:
migraine attack or headache
excess estradiol and/or estrone
vitamin D deficiency
osteoporosis
emotional response, due to fear, embarrassment, grief
anemia, due to blood loss, poor nutrition, or underlying disease such as sickle cell anemia
shock, a medical emergency caused by illness or injury
frostbite
common cold
cancer
hypoglycemia
leukemia
panic attack
motion sickness
heart disease
Peripheral vascular disease
hypothyroidism
hypopituitarism
scurvy
tuberculosis
sleep deprivation
pheochromocytoma
squeamishness
visceral larval migrans
high doses or chronic use of amphetamines[1]
reaction to ethanol and/or other drugs such as cannabis
lead poisoning
methyldopa