Shift as Mitch said and make sure the engine isn't idling faster than 500 RPM, and have 600W gear oil in the tranny as Big hammer said.
Once those are correct, then when you get to about 6 MPH, push in the clutch and shift to neutral. Let the clutch out and let the engine slow down for a few seconds, then push the clutch back in and shift to second. Once I reach about 15 MPH, I push the clutch in and shift to neutral. Then let the clutch out and let the engine slow for a few seconds, then push the clutch in and shift to third.
When you downshift you push the clutch in and shift to neutral from high at about 15 MPH. Then let the clutch out and rev the engine (usually more rev than you'd think), then push the clutch in and shift to second. I almost never downshift to first, but if I do I make sure I'm going no faster than about 5 MPH.
Synchromesh.........what a great invention.
