c/budget-travel-hacks

Using a friend's address for cheaper museum entry is a popular budget hack, but doing it made me question where the line is.

Booking flights early is supposedly a scam, but it secured my dream hostel spot.

Locking in dates months ahead meant I got the LAST cheap bed in a prime location.

Confused by carry-on size limits on budget airlines

I booked a budget flight thinking I got a great deal. At check-in, they said my carry-on was too big by their metal frame. I had to pay an extra fee that ate up my savings. My bag fit fine on other airlines before. Why do these rules vary so much between companies? What tricks do you have for checking bag size ahead of time? Has this happened to anyone else here?