Yeah, those things can really clog up the gutters.
There are various options for ya. It all depends upon how much money you're willing to pay and if you are going to do the work yourself or contract it out.
I like the screened guards that simply slide under the shingles and clip to the inside edge of the gutter. One - because they're a $1 each (36 inches long) and two-when it rains real good here, the majority of the water goes into the gutter...yet there's a guy two doors down from me that has one of those cap-like systems and it's a regular waterfall in his yard.