Determine how concentrated your standards should be. If you expect your experimental solution to be around 0.3 M, then start your standards around 1 M. If you expect your experimental solution to be closer to 0.03 M in concentration, then start your standards around 0.2 M.
Create your most concentrated standard. To make a 1 M standard, calculate the molar mass of 1 mole of the substance that you are measuring. If the substance is NaCl, for instance, consulting a periodic table shows that the atomic weight of Na is 23 and the atomic weight of Cl is 35.5; thus, the molar mass of NaCl is 35.5+23=58.5 grams.
Use a balance to weigh out 58.5 grams of NaCl, then add 1 liter of distilled water to the mass to obtain a 1 M solution of NaCl.
Calculate your other standards by cutting the amount of NaCl in each subsequent standard by half. For instance, if your most concentrated standard is a 1 M solution, the next standard could be 0.5 M, then 0.25 M, then 0.125 M, and so forth. A 0.5 M solution will contain 29.25 grams of NaCl, a 0.25 M solution will contain 14.625 grams, and so forth.