How to fix a door that is sagging or rubbing against the frame

What people tried

Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.

1. 1
   widening the door latch hole
2. 2
   using wooden shims or playing cards to align hinges
3. 3
   tightening loose hinge screws or using toothpicks in stripped screw holes
4. 4
   using a pump air wedge or a crescent wrench to bend and align hinges
5. 5
   chiseling hinge recesses or sanding down the door or frame
6. 6
   Lowering the strike plate
7. 7
   Raising the hinge side door frame
8. 8
   Tightening frame screws
9. 9
   Checking for storm door sag
10. 10
    Lubricating the hardware with lightweight dry lube
11. 11
    Tightening loose screws on the hinge
12. 12
    Replacing the door
13. 13
    moving the bracket to the reinforced stile in the middle
14. 14
    installing a side mount opener with a new spring
15. 15
    using a bent arm type connection that pivots a bit
16. 16
    Readjusting the hinges to lift the gate
17. 17
    Repositioning the bolt or latch
18. 18
    Installing a turnbuckle anti-sag kit

In their words

Unedited, most upvoted first, each linked to the thread it came from.