depends on how many mg per week you are taking and, also, if your stuff comes in an amp or a vial because you could choose how much you will inject if it's in a vial, but it's not sterile or safe to save half an amp... But anyhow, if it's two shots a week i'd hit a monday/thursday schedule, or if it's three monday/wednesday/friday
I have to agree with Bulldog on this one. Depending on the amounts you are want to run... Every 3rd, 4th, or 5th day will help keep consistant test levels.