As much as I hate to recommend this, because I'm a newly-minted DE aficionado, I would suggest the Head Blade. It's practically foolproof, and while I don't like it personally as much as I enjoy shaving with a DE, the Head Blade is both easy to use and reliable. They sell for about $15 and I found I got 5-6 shaves minimum per blade. Maybe as many as 10-12.