My recipe for perfect macarons (link below) is what I would consider to be as fool-proof as is possible. It has full step-by-step instructions and troubleshooting for perfecting macarons, along with recipe links for many flavours.
Click here for the recipe for perfect macarons.
Jaffa cake macarons
Bitter orange macarons
blueberry & raspberry macarons
Peach Bellini macarons
Blackcurrant and mint macarons
macaron tower: with caramelised blood orange & cranberry flavour
Ginger macaron snowmen
smoked salmon & horseradish macarons
pistachio, lemon and raspberry macarons
A full index of all my recipes can be found here.