I use various means:
Favourite authors: there are certain authors that I know I enjoy, and I'll buy anything they publish. Eg Peter Robinson in the crime genre, and Stephen Baxter in SF.
Favourite publishers: I buy all Baen's monthly bundles, because I know that I'll enjoy the overwhelming majority of what they publish.
Recommendations: I buy a lot of books based on recommendations I see here at MR. Eg I'm currently reading (and very much enjoying) Andy Weir's "The Martian" after seeing recommendations for it here.
Deals: Amazon often have great deals that are hard to resist.
|