Which DIY procedures are hardest to fuck up?

[Tneedtoimprove]

I've seen people do outrageous DIY's like M.A.R.P.E or buccal fat, then "Calmer" ones like DIY fillers. Which DIY procedure has an actual valuable ROI relative to its risk level?

 

[7Azcendr7]

Eyebrow waxing and/or threading.

 

[vzk]

Oral commissire flip