Some interesting DIY prepper projects for self sufficiency and self sustainment when the world goes to hell in a hand basket.... http://www.shtfpreparedness.com/top-10-jerry-rigged-projects-preppers/ I particularly liked the wood gasifier for electricity generation.
There is a risk factor with many situations where combustible gases come in contact with ignition sources. DIY efforts probably increase the risk factor quotient. The cautionary video clip is well worth taking note of.