Eat food rich in iron (meat, fish, greens, beans, dried-fruit, etc) along with foods that contain vitamin C. Vitamin C hels with the absorption of Iron. These also contain vitamin B12 and folic acid, which help with red blood cell production. Eating these foods should help keep your hmoglobin level at maximum in case of 'unforeseen occurrences'.

Does anyone have any additional suggestions? This is a good question.