Dungeon 8

 If you noticed something is amiss with Dungeon 8's first room, you're right. Push this block out of the way to reveal a staircase.
The Silver Arrows already! These are useful because they're twice as powerful as traditional Arrows, and they are needed to beat Ganon.
One thing about this dungeon is that most of the walls can be bombed. So those who enjoy blowing random shit up can rejoice. Go ahead and blast holes in the upper and right walls after defeating the Zols and collecting the Key. Go to the room on the right first.
It's the Book. Pretty worthless as far as Zelda items are concerned (it only adds a measly flame to your Wand blasts), it's still nice to have, I guess. Blow up and go through the upper wall.
A Dodongo. You know what to do. The room on the right just has the Old Man. You probably have an excess of Keys anyway, so you might as well visit him to keep him company.
Keep going left now. Blast holes in walls as you go if you'd like.
This room is dark, and won't light up at all. That's no problem, though. Grab the Compass and work your way through. The room below you just has some Gibdos and Floor Traps, and the room to your left can be blown open to reveal a Fairy Pond. Blow up the upper wall and go that direction (after healing at the Fairy Pond if need be).
Remember this room for future reference. Don't go up yet, head to the right instead.
When you get to this room, go up (blast the right wall if you'd like, but it's not necessary).
Now you'll want to turn right (as if you had any other choice).
Keep following the path and you'll reach the Map. It's not really necessary to have, but it gives you a warm fuzzy feeling collecting things, doesn't it?
Return to the room with Blue Darknuts I told you to remember. Now go up. You'll find a Patra. This is the easy variety of Patra, so you should have no trouble. Beat it and reveal this staircase.
If you're perplexed by this Old Man, he's referring to the Wall Masters in the next room. They'll take you to the entrance where you found the Silver Arrows, remember?
Follow the path to reach more Dodongos. If you have at least 6 Bombs, you should have no trouble.
Another Aquamentus! It's like the one from Dungeon 7, but it's still easy. The next room has another one of these guys, but you can skip that battle.
The "real" boss is this pair of Blue Gohmas. If you have the Silver Arrows, it'll take two Arrows to each of them to beat 'em. It takes three normal Arrows. Either way, this is an easy fight.
Finally, all 8 Triforce Pieces! Now let's go pay Ganon a visit...