Grammar
Style guide 
Dangling modifiers
A present participle is ‘dangling’ when the subject of the -ing verb and the subject of the sentence do not agree.
Running to catch the bus, Betty’s umbrella blew inside out.
The subject is Betty’s umbrella, but it isn’t doing the running.
I think dangling participles are often okay, but sometimes they can cause confusion or sound clumsy. For example, in the sentence below, a car can’t change its own oil. Compare:
Changing the oil every 3,000 kilometres, the car seemed to run better.
Ivan found the car ran better if he changed the oil every 3,000 kilometres.
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Other grammar tips include:
me, myself, I am
prepositions - in and at
who and that