These lessons give you a number of strategies for modulation between keys. Some of them are simple and some of them are elegant. Modulating well requires a good knowledge of theory as well as the ability to improvise so visit those free lessons well.
Are modulations overrated?
More about modulations
Modulation between keys
Modulating up a half step
The simplest modulation possible
Modulating around the circle of 5ths
Another modulation example
Rules for modulation
Modulations: is ii – V – I enough?