Oh my goodness, Katex. We could be here all night talking about this.
These are the ones I would like to mention.
It is 'should have' not 'should of'
Where, were and we're may sound the same but mean different things.
Same goes for there, their and they're.
It is hospital not hospikal.
Oooh that's better.

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Old aunts used to come up to me at weddings, poking me in the ribs, cackling and telling me
'You'll be next.' They stopped when I started doing the same to them at funerals.