Note: YES, I KNOW that most people know these things. This is more for newbies and begginers.1. To get music discs, make a skeleton shoot a creeper to death! XD
2. To build your own end portal (in creative) without looking for one, you will need end portal blocks, eyes of ender, and nothing else. You can also use TMI to grab End Portal (Entity) and place it directly.
B. Place 3 end portal blocks, turn right, place 3, turn right, place 3, turn right, place 3. FOLLOW THE INSTRUCTIONS COMPLETELY!!! If you don't, the portal will not activate!
C.Place the eye's of ender in their places. It should work, and if not, then retry, and follow the directions.
3.To make a cobblestone generator, you need lava and water buckets. place a block of something, and direct it so the lave goes to one place when you place the lava on top. And then, place a bucket of water on the ground., and direct it toward the running lava, NOT the still lava, as that makes obsidian. It will generate cobblestone!

I hope you learned something! (You probably didn't, though. This is my first blog.)