Five Great Mining techniques that will get you ore Fast!

The title says it all. Note that these are in no particular order.

1. Strip mining. Just mine it a straight line.
2. Dig straight down. Never do this directly below you. Dig a 1x2 pit, standing on the higher block until bedrock.
3. Staircase to bedrock. Make a staircase to bedrock. Also, you can do a  railway.
4. Tunnel mining. Every 6 levels, strip mine for 20 blocks.
5. Blast mining. Use tnt to mine. Dangerous, but effective.