reset circuit

is the reset circuit essential for every project based on microcontroller. please guide me on a reset circuit for any microcontroller. what all points must be considered while desigining areset circuit

Yes! Reset circuit is the most important part of a microcontroller. reset circuit activates the oscillating pulse in microcontroller only then crystal starts working and hence controller starts working

Regarding deign of reset circuit, you just need to go through the datasheet carefully, to understand how a microcontroller can be reset.