wasn't trying to be sarcastic, there are loads of ways of doing gutters, but the cheapest and easiest is always done by ladder - if it's safe that is !!
I use a cheap diy guttervac on minor work, have used jet lance on some, but ladder is always easiest.
Use anything that can be used to scoop the crap out of the gutter, i push pull crud along with pole with a scoopy thing on it !