Cut the tree into 6' (or longer) sections. Start from the end of the whole log with an axehead positioned to split the log in half, through the pith (center). Drive the axehead into the end. Place a wedge in the side of the log where a split started just passed the axehead. You will likely need 2 or 3 wedges depending on the girth of the tree. More girth; more wedges. Drive the wedge into the side of the log at the split. The split will travel down the length of the log. Take a second wedge and do the same. Continue hopscotching the splitting process until you reach the end of the log. Quarter splits are nice. If you have good girth you can split them again. Seal the ends with cheap polyurethane, paint or wood glue. This will help slow the drying process and avoid checking. Gary Davis has a new DVD out available from Three Rivers Archery in Michigan. Gary shows the whole process on the bowmaking DVD. If you follow it, you can't go wrong.