Like Pitcher said, depends on the magnitude of the things in question. The examples you mentioned are things that are no longer capable of angering me. During my usual daily activities it's very hard to get me mad, no matter how many things go wrong. I'm usually tense anyway, very rarely do I feel comfortable enough to ease up and let my guard down. Being in that state of mind makes it so I'm willing to ignore all the minor mishaps, so I could be ready when a major fail comes lurking around the corner.
But if I'm taking a well-deserved break from something and someone wants me to do something for them(something they could easily google and fix themselves), I tend to get annoyed after a certain point is reached. However, I've managed to make the people around me realize that I will only help them with anything if I feel they deserve the help and they really are incapable of taking care of it themselves. There are few people for whom I'd do a lot, and there are many who I'd simply point in the right direction and leave them to figure it out by themselves.
Of course, some things are capable of immediately pissing me off, most(if not all) of them being caused by human beings. I've had too many physical confrontations with people who simply wouldn't take verbal persuasion to stop behaving like pricks. Especially where unnecessary cruelty is involved, I'm quick to anger and attempt to disable whatever is causing it. But that rarely happens nowadays.
Where day-to-day life is concerned, I'm one of the calmest people you'll ever meet(or at least I appear to be). As a great man once said "Don't sweat the petty things and don't pet the sweaty things".