Having trouble with play right before the final table

[redsoxsox]

What is considered the best way to play the period right before the final table? When it is about 15 to 9 people left. Im starting to notice that my play in this period isnt that strong and I wanted to fix this leak. Should I be playing it like another bubble period and being incredibly aggressive, since people want to make the final table? Should I be taking shots and gambling with a lot of hands?

Alos since I play mostly PS tournaments with there structure at the end of tournaments is there a certain way to play them at there site. For instance less raises and more pushes?