Solo techniques

I went to a blues show last night, it was very boring except for a biiiiig 10 minute bass solo in the middle. everybody walked offstage except the bassist and drummer. It was mistly the bass player with a little call and repeat with the drums. But the solo was amazing with harmonics and shi†. It was really cool so can you give me any tips, especially for the solo part in So What that I need to play for school.
thanx