Sewer drain keeps clooging needs replaced. Any ideas on preventing the clogging?

My old clay sewer drain pipe needs replaced due to shifting in the soil that caused it to become uneven. Does anyone have any ideas on how I can prevent the clogging as a temporary fix until I can get the money to afford to have the pipe replaced, as it will probably cost a couple thousand. I would rather not have to pay my plumber $150 a visit to unclog it either as I have done twice in 3 months!