Switched out the breaker without killing myself but the new one is tripping too. 
Did you up the amps on the new breaker?
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No, the YouTube guy I watched was pretty emphatic about getting the exact same kind of breaker and amps.
Yeah, that is correct, don't ever do that.
Does it trip like right away, or does it take "time" ie it holds and then trips later.
So the garage breaker intermittently tripped (like maybe once every two months) for a while, but over the last month, it started tripping progressively more often (weeks --> days --> minutes). Over the last week, it started tripping minutes after i flipped it, and eventually, after i messed around with it for a while, it would flip immediately. After I replaced it, and as things are currently ( 
), it trips after a few minutes.
After I replaced it lastnight and it stayed good initially, i was ecstatic. When I tested it again a few hours later and learned that it tripped again...I don't know if i've ever been more disappointed about anything in my whole entire stupid life.
I troubleshoot more or less for a living so this crap gets me excited rather than frustrated but understand when you don't know.
Reason I asked how long is breakers do two major things: overload and instantaneous protections (they have a timed component but that's really more to bridge the gap between the two). Overloads are like too many things plugged in, instantaneous would be a short (grounded). Given how you described it here I'd actually wager it's a conditional ground, ie, the right conditions have to be met, so something like how XcoloteThundarr had with moisture in something, or it could be a wire whose insulation is thin/worn out and as it heats up with current it expands and rubs into metal or a ground wire, or it's in the garage door openers/lights themselves and their operation triggers the short. It could also be that outlet, though it really depends on how it looks, scuffed shouldn't matter, but if it's pushed back or is askew or if it looks like something could get between the prongs that could do it.
I suppose it's hard to know but moisture does seem a likely culprit. I wonder how closely your issues are tied with snow/rain/high humidity days.
