Best way to attach case fan without screws?

[MeepsterNotchy]

All the case fans that fit just right in my case (92mm) are way too loud, and I bought a 120mm and it it so much quieter! I currently have it zip tied to the case (didn't raise CPU temp by using wrong size). Any better ways to attach to minimize vibrations and just hold it in better?

 

[Rhinofart]

Really good 2 sided tape? Screws are best, but your zipties are likely the next best bet.