What are the 'rules of thumb' (I understand that there are many combinations and permutations of potential situations...but as a dedicated Novice...at the beginning of this 'steep learning curve'...I am still looking for rules-of-thumb) when it come to both: 1) My stack size and betting as well as 2) my stack size toward the ends of a tourney?

Any other pearls-of-wisdom you can share with me are 'greatly' appreciate ;- )

Happy Trails and
Best Personal Regards,
Dr. Walt