I get tiller squared away with a cabinet scraper that leaves very little sanding work left to do.  I take it to 320 grit, wetting the wood and letting it dry between levels of grit.  Then seal and fill grain with shellac, linseed oil and 0000 pumice as a kind of french polish.  Once the grain is about leveled over, I start applying linseed oil and wax in alternating coats. 4-8 coats of each.  The wax is a blend of beeswax and douglas-fir rosin (refined pitch) that I make as a bow string wax.  I keep playing around with different homemade varnishes, but I always comeback to the linseed oil and wax in alternating coats.