I should probably explain that a little better:
EG: a wheel requires 1-1/4 oz of weight at the light spot. Mark the light spot for reference using tire chalk. Use two 3/4 oz weights, spaced, say, 40° apart (ie: 20° on either side of the marked light spot). Temporarily hold the weights in place with a piece of painter's tape. Check the balance.
If the light spot is still the light spot, move the weights closer a bit (eg: 10° on either side of the light spot). If the light spot is now the heavy spot, move them apart a few degrees. Once you find the perfect balance, mark the locations, remove the painter's tape and the backing paper and permanently install the weights.
(Note: make sure the rim is spotlessly clean or your weights may fly off in use. I like to use brake cleaner and a fresh shop towel).