You're super likely to not need them yourself, the companies you've dealt with will likely have their records digitized for the 7 required years (or more)

Keep them for 1-6 months to make sure no funny business happens (I've caught my ISP pulling bullshit and proved it with my last 6 bills kept) and then shred them and you'll be fine

Oh, and try to get anything you can sent to an email with privacy, then they come digitized and can be kept forever with no real effort