I, well we, use a 4-way wedge similar to the one on this page:
http://www.northerntool.com/webapp/w...ategoryId=1466
Ours has 4 sharp angles that splits a log 4ways but has the same flat head for the sledge as this one...and its pretty cheap. Hell if an old gal like me can do it this way, anyone can. Good luck!