Its easy..
1. Nakal kafala ( go to any typing centre and he should explain you and prepare it for you for 5riyals ).
2. Your company computer card copy/CR copy thats what they say.
3.Your Id/Sponsor Id copies.
4. Your Passport Copies.
they might also ask you for Police clearance certificate of your home town ( you will able to get it in your embassy )
5. If born in Qatar ( CID clearance certificate )
6. Take help of your company PRO