The below Method is for when password Recovery Mechanism is Enabled For other situations and scenarios see the link below.
Step 0 : Press the Mode button, and at the same time, reconnect the power cord to the switch.
You can release the Mode button a second or two after the LED above port 1 goes off. Several lines of information about the software appear along with instructions:
The system has been interrupted prior to initializing the flash file system. The following commands will initialize the flash file system, and finish loading the operating system software#
flash_init
load_helper
boot
Step 1 
Initialize the Flash file system:
switch: flash_init
Step 2 If you had set the console port speed to anything other than 9600, it has been reset to that particular speed. Change the emulation software line speed to match that of the switch console port.
Step 3 Load any helper files:
switch: load_helper
Step 4 Display the contents of Flash memory:
switch: dir flash:
The switch file system appears:
Directory of flash:
13 drwx 192 Mar 01 1993 22:30:48 c3560-i5-mz.121.19-EA1
11 -rwx 5825 Mar 01 1993 22:31:59 config.text
18 -rwx 720 Mar 01 1993 02:21:30 vlan.dat
16128000 bytes total (10003456 bytes free)
Step 5 Rename the configuration file to config.text.old.
This file contains the password definition.
switch: rename flash:config.text flash:config.text.old
Step 6 Boot the system:
switch: boot
You are prompted to start the setup program. Enter N at the prompt:
Continue with the configuration dialog? [yes/no]: N
Step 7 At the switch prompt, enter privileged EXEC mode:
Switch> enable
Step 8 Rename the configuration file to its original name:
Switch# rename flash:config.text.old flash:config.text
Step 9 Copy the configuration file into memory:
Switch# copy flash:config.text system:running-config Source filename [config.text]? Destination filename [running-config]?
Press Return in response to the confirmation prompts.
The configuration file is now reloaded, and you can change the password.
Step 10 Enter global configuration mode:
Switch# configure terminal
Step 11 Change the password:
Switch (config)# enable secret password
The secret password can be from 1 to 25 alphanumeric characters, can start with a number, is case sensitive, and allows spaces but ignores leading spaces.
Step 12 Return to privileged EXEC mode:
Switch (config)# exit Switch#
Step 13 Write the running configuration to the startup configuration file:
Switch# copy running-config startup-config
http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/ release/12.1_19_ea1/configuration/guide/swtrbl.html#wp1090048
