I agree with some of the others.. Upgrading armor is a Must.. and your weapons.. If you don't you will be one shot. Also more health and stamina is always good. I really don't use the bound bow as it doesn't do all that much damage, even with conjuration leveled up. Instead work on Smithing and make an Ebony, Daedric or Dragonbone bow then upgrade it. Also don't forget to enchant both your weapons and armor.. and last but not least.. The Lord Stone can help reduce damage taken as well.
So Skills to level up to help you...
Enchanting-100(For all gear)
Smithing-100
Alchemy -100(For poisons, ones you can craft a re far better than random world ones)
I assume you been leveling Archery, so thats a no-brainer, and pick one type of armor.. Light or Heavy (And spend the perk points on it, IE, all 5 into protection given, plus all the way up to making it weightless).. Every level if you have the gold, buy 5 ranks from a trainer to help speed things along (leveling alchemy is a good way to make extra gold as you can sell all the potions you make at all the holds alchemist shops).
Remember, if you have all the content you can also make your own arrows which is tied to you respective Smithing level. Just Chop wood and have the right metals and voila.. bottomless arrows.