You need to eat meat with vitamin C(fruit or something with vitamin c in it), it isn't just a matter of eating iron and that is where people go wrong buying iron tablets. It won't be absorbed without certain elements helping it along.
Many iron supplements can cause problems with your digestive workings (i.e. you cant poop ...), and can leave a horrible metallic taste in the mouth. Try supplement with diet as much as is possible/feasible (dark chocolate is a nice afternoon snack if you are feeling tired). Dose up on Vit A too (as this helps 'move' the iron from storage for processing).