How can I improve my MTT 'end game'?

Hey guys, new to this so forgive me if I've not posted this in the right place.

Just looking for some advice really - I play often at my local casino in Bristol and I constantly seem to find myself with around or over double the average stack when the tournament reaches under 30 players. With that said, I always seem to struggle to get to the final tables.

How can I improve my 'end game' to ensure I don't end up blowing my big stacks when I have a genuine chance to take down the tournament? Is there a way I can utilise my bigger stack to stay on the front foot and continue adding chips to reach final tables? Any tips?

Thanks!

hi!
lern to 3bet more often and to bluff more
you cant wait for premium hands in that spot.you have to open your range
play some sng turbo with 18 players to immprove your game

Usually at the end of the tournament the blinds are high, so it worth you press the smaller stacks , stealing the maximum of blinds you can, controlling the pot when facing a player who has more chips the you , but of course you have to know playing styles of your opponents to know the right moves against them

In addition to high blinds and antes, you should be more aggressive because more and more of the time tournament is played with less players in table. If there's 6 players on the table instead of 9, your game should be FAR more aggressive and you should play more hands so that you won't take hit from blinds.