Here's a simple scarf idea esp if you only have basic tools:

Lay the 2 pcs of wood one on top of the other with the 2 ends to be joined on top of ea other. Flip the lower pc to its top up, and the upper pc w/ its top down so they both touch. Take the width of the wood and multiply it by whatever scarf you desire. Say they're 1/2in wide and the desired scarf is 1:8. Off set the top by this distance (1/2 x 8 = 4in). Clamp them both together in this orientation 4in away from your table's (or some scrap) edge. With a good sanding block say 8in or longer, work back and forth until the intersection betw the 2 strips and the table edge is reached at the same time. Flip and glue.

Basically, you don't even have to measure or use the table edge, just offset ANY old distance - no matter what angle you choose the result will be straight, rough shape w/ any old saw, and sand w/ a good straight block sander. Obviously if you can hold the downside edge from fraying, a long plane would be pretty fast and good too.

-mick