Defending blinds

Hello all,
I recently played in a free roll tourny online with about 1300 people. Much later into the game I was at one of the final two tables with 6 hands at my table. I was 2nd to the chip leader with around 30k chips and the blinds where 600/800.

Around the time of the 13th person going out everyone started playing very tight to make the top ten and that's when the blind stealing started. I folded a few decent hands after raising because decent chip leaders kept going all in. After getting frustrated with folding good hands to a blind stealer I called with a 10-J suited. The big chip showed A-Q and ultimately won with high card.

At this point in the game how do you defend without going out?
Thanks!