If you are wanting to travel to the End,you will need Ender Pearls. However, you must craft them,and many pople want a way to farm Blazes. This page will show how to farm Blazes.
1. Snow-Rich Farm
(NOTE) This is the only farm so far. I will add more in the future.
You need lots of snow for this,and some pumpkins.
First, travel to the Nether and find a Nether Fortress. Look for a Blaze Monster Spawner. Then, build Snow Golems around the spawner. When the Blaze spawns, it will be killed. This method also works with Iron Golems.