Triple (or if y're like me Quadruple) measure sloe gin
One or one and a half measures tonic water
One measure Campari
Ice, lots of
Add great big fucking slug of blood orange juice*
Drink whilst listening to Mudhoney at appallingly high volume.
*Or possibly smaller slug of pink grapefruit juice and a little bit of grenadine to take the edge off. Just occurred to me.