Our oldest advise is to make the mast stand straight up. How far it tips forward or aft. Actually, I have my mast raked back 5 inches and this really helps pointing without adding noticeable weather helm. Then you have to go sailing. About 10 knots is nice.
Smooth water is best.
Close hauled on equal and alternating tacks you should slowly remove excess slack from all shrouds. Check your wind instruments at the same time. Eyeball the mast track or the front edge of mast. You must keep it straight at all times. Overall, the forward lowers should be tighter than the aft lowers.