Get more ammo
When searching a file folder or something else and you find ammunition, you can keep searching it and you should keep finding more. You can actually return to the file folder with the ammo at anytime and do it again and stockk back up on ammo.

Easy skill points
When using Bond Focus, shoot either target and you will get some skill points.

Bonus missions
As you collect awards through the game a number of bonus missions are unlocked, these are as follows:

Tunnel: 10 awards
Ruins: 25 awards
Plaza: 40 awards
Airport: 60 awards

Snow Suit
You can get the snow suit in the game on the factory level, finish the jetpack, go to the boxes by the door and it will be around there.

Formal Dinner suit
On the second level, after you have completed the maze and found yourself in Moneypennys office. Look through her drawers and you'll find the suit. Do this before you go into M's room.