Do you mean you have only 24 hours left on your sheriff lock out? If this deadline is something other than that, then you have more time. If that's what this is, you'll need to seek housing with friends or family or shelter in one of the available facilities for homeless people.
Disclaimer: Please note that this answer does not constitute legal advice, and should not be relied on, since each state has different laws, each situation is fact specific, and it is impossible to evaluate a legal problem without a comprehensive consultation and review of all the facts and documents at issue. This answer does not create an attorney-client relationship.
Your question is posted on a Friday, which means that you believe you have to vacate on a Saturday. Even if you have a "Notice to Vacate," and even if this Notice says that you have to be out by January 29, 2011 (usually it will say at 6:01 a.m.), it is highly unlikely that the sheriff's office will conduct a lockout on a weekend. If they do, you'll have little choice but to leave. If you refuse, you could face arrest.
If the sheriff does not perform a lockout this weekend, you can file an emergency "Petition for Stay of Execution of Judgment." This is a formal petition to the Court that explains the reasons you cannot move out by the specified time, and seeks a temporary postponement (usually 30 days). In the event you file this petition, be prepared to pay an "undertaking" to the Court. This is an amount of money equivalent to the rental value of the property for the period of time you'll be postponing the lockout. Courts will often grant these petitions only on the condition that the undertaking is paid.
Some counties have form petitions for you to fill out. Others have never heard of them. Contact an attorney or the Superior Court in your county to find out the process where you live.
You should seek formal legal advice immediately to determine whether you actually face a lock-out (as opposed to some other event in the unlawful detainer process). If, for example, you received a three-day notice to quit, you can likely live in the property for at least another 30 days before a lockout, assuming you have competent legal representation. Only inspection of the actual document will enable an attorney to give you more specific guidance.