I would use the following in order of preference:

1: The RESET instruction, if present
2: Allowing the watchdog to timeout, if possible
3: Some sort of hardware means of forcing an MCLR reset
4: Carefully resetting all peripherals, followed by GOTO 0

NOTES:

Option 3 requires hardware support, and getting that right is perhaps not 
trivial.
Option 4 is not for the faint of heart, and is *not* recommended unless 
there is absolutely no other choice!

-- Bob Ammerman
RAm Systems

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist