I've got a 1910 center hall colonial house with some bouncy and squeaky floors. I've watched a lot of YouTube and read a lot of threads on these two issues but I wanted to float an idea to may be kill two birds with one stone: glue bridging to the decking/subfloor to cut down on the squeaks and nail the bridging to the joists (which are rough sawn fir somewhere in the 2x8 or 2x6 range, 16 on center, spanning 16 feet). Any squeaks that are not from the subfloor/decking I will then screw the hardwood floors down using that cool screw tool Tom Silvia used in that one episode of Ask This Old House.
The blocking may just be wishful thinking, but sistering is out of the question on almost every joist (JUST put in new electrical and plumbing before this started to drive me nuts, and I want to try this before I put in a beam). Any input would be greatly appreciated.