MOJITO

Inventory Management
Just because you did lots of work for the week, don't write everything in the same weeks status report, save something for the next week. If you write everything, ofcourse you will be praised, but your manager expects the same amount of work next week too. Thats why he is a manager.

Quantity over Quality
Rather than what/how you did the whole week, the number of lines in the "Accomplishments for the week" column matters. Say, instead of writing "Implemented and tested feature X" split it to as many lines you can. Analyzed X, Coded X, Wrote test cases for X, Unit tested X, Reviewed X and so on.

Avoid 7.5
Never write "Yet to be decided" in "Plans for Next week" column. That is like putting saniyan inside the baniyan(courtesy: Kanaa Kaanum Kaalangal). You will be given all the junk work for the rest of the week.

All in vain
Managers always think different. Whatever you write in the weekly Status report is not gonna change his opinion on you. If he has a aapu ready for you, he will deliver it to you in some form or the other.