There are a number of hopping techniques which can be combined in different ways to construct different hopping techniques. This page defines each technique and how they can be used for jumping high on a unicycle.
Seat in hop
Seat out hop
Pre-hop
Rolling hop
Side hop
High jump techniques can be constructed by making 3 technique choices. The next section will discuss each combination in (my somewhat subjective) order of effectiveness.
Seat in or seat out
With a pre-hop, or without a pre-hop
Rolling into the hop (or pre-hop), or side hopping from standstill