The perk "Power Shot": staggers all but the largest opponents 50% of the time.
The ability to punch with your bow.
Both of these stagger an opponent, which opens them to another shot.
I see an enemy, I shoot an arrow at it. The enemy comes at me, continue firing. On the first stagger you get with the "Power Shot" perk, charge the enemy and get close - shoot again. If you don't stagger, punch the enemy with your bow. Stagger. Shoot again. No stagger, punch again. Shoot again. Stagger. Shoot again. No stagger. Repeat.
Of course, this might require a lot of stamina, but I've never run out in a fight unless I'm against a boss, which I have stamina potions prepared for. I fought a Draugr Scourge with this method and came out unscathed and used only one Potion of Plentiful Stamina. Fighting against a spellcaster is the same, you can't cast while staggered (as long as you keep close to the opponent).
IN CONCLUSION: Archery is 'hella overpowered.
Just my two cents.
+I am on Expert difficulty.
+Dragons go down easy as long as I have cover, and a companion to take some hits with.
+The massive opponents (the ones that don't stagger with power shot), this method doesn't necessarily apply to them. Fortunately there aren't many.