(Psi)SeveredHead
Adventurer
Shalewind, you can only prepare spells once per day. It doesn't matter if you're an elf (4 hour meditate) or a thri-kreen cleric (no sleep). You can still only do that once per day. For wizards and sorcerers, you're supposed to do that in the morning, and cannot prepare until the next morning. Clerics must pick a specific time of day (eg noon) and always prepare spells that time of day.
To anwer your question: no.
To anwer your question: no.