wardo is either an insane person or someone pretending to be one (most likely the latter) - most of us block him, i would advise it!
i like to start by setting my best player to somewhere in the 12-14 ballpark, i usually just start with 12, and then go on down from there through the players of the same class (guards or bigs, or probably better to say 3pt scorers and 2pt scorers). so if my best player is a 3pt scoring guard, i put him at 12, then go through the rest of the shooting style guards, in order of goodness basically (order doesn't exactly matter but it kind of helps frame things). then for each guy, i compare him to my best guy, my 12 guy, and i think - if these two are playing together, what ratio of shots do i want them to take? should the good guy take twice as many shots? if so, then the 2nd guy gets 6. should he take slightly more, say, 20% more? if so, then the 2nd guy gets 10. i carry on in similar fashion until all the guards are done - and then sort of make sure the ratios of the rest of the pairs of guards (mostly, the better few) makes at least some sense, on a relative basis (its kind of like, a way to check your work - make sure the conclusions drawn from the numbers you came up with on your first pass, make sense - for example, if your best 3 guards are 12-9-6, does it make sense the 2nd takes 50% more shots than the 3rd when they are playing together? that sort of thing).
then, i go through the other class of players, in this case, the 2pt scorers. start with the best, and set distro, keeping in mind that bigs score less than guards given even distro, but that guards are in general more efficient. if those last bits confuse you, just ignore them, and then observe for a few games how much your bigs are scoring vs guards, how many 3s you are taking, and adjust a little if needed. anyway, from there you do the same thing again - go through the rest of the players, comparing to the top 2pt scorer, and setting distro on the way down. do not be afraid to have a couple/few 0s on the team, assuming you play about 10 players (not sure i'd want 3 0s on 8 players).
this gives you what i call your 'natural' distro - based on the talents of each player. from here, you need to consider if this is balanced enough or not, on several fronts. 1) is your team going to take a reasonable, or better yet, ideal amount of 3s? if not, you may need to adjust some to get in the range you want to be. you should both try to project this out mentally, as well as observe the results. 2) are any of your players in danger of exceeding 40% of shots taken while on the floor, on a regular basis? if so, they will take a fairly severe penalty on their shooting efficiency, whenever this happens. project this out for starters by adding up your starting 5's distro, and then dividing your highest distro guy against that 5. if this is a guard, about 30% is the highest i want to be. bigs can go a bit higher because they take a little bit fewer shots. 3) any other reason your team is overly susceptible to enemy game plans? i want to emphasize - you play your team first, and the opponent second - and its not even close. that said, if you look at your team and feel you are significantly vulnerable to a substantial + or - defense, or to double teaming, you may want to adjust a little bit to mitigate that vulnerability. #1 and #2 are the big two - but its good to think about #3 as well - just don't overdo it! its often a six-in-one type situation when you set distro, you end up on the fence in like, possibly every single case :) just by breaking all those ties or almost-ties in the direction that helps with #3, it can help.