What should be avoided in Sikhism?

There are four taboos in Sikhism:

1) One must not cut or shave his hair.

2) Intoxicants must not be taken.

3) Adultery should never be commited

4) Never eat meat from an animal that has been ritually prepared e.g. Halal/Kosher. Sikhism teaches that there are "five thieves", things which lead to sin and suffering:

1) Kam - Lust

2) Krodh - Anger

3) Lobh - Greed

4) Moh - Attachment (to physical things)

5) Ahankar - Ego