Uhm...I don't know if those get superstrong superfast methods work or not since i haven't tried'em but my advice is that you should do it old school. This isn't something that'll just happen in a couple of months, this is a long procedure that'll prolly take...well more time than you would like it too xD
When i started training i first tried to read up on how the body works so I would understand a little more and also figure out what my goal would be with the training, and how i was to achieve that goal. (Well actually my friend did all the reading and later told me but that's not the point
) Anyways my goal was to become slim and a little toned while my friends goal was to become "stronger" and get bigger muscles. So for exampe when i went to the gym and was going to train my tummy, i didn't do the machine with weights, instead i used my own body weight to do situps and different workouts which required no weights and i did many of them in about 2-3 sets. (like 40 crunches times 2-3) or something like that, while my friend used the weights and did a lot less crunches, like only 6 in 2-3 sets, but with very heavy weights. I think thnat sort of training was called explosive trainig or something like that. Now the same principle can be aplied to any musclepart more or less. So as i understand you wanna get bigger arms? Well then you gotta use heavy weights and do a little of them i 2-3 sets. And when doing the slim training thing that i did you can't take big breaks from each set, only little rest, while my friend could rest for like 45sec-1 min or something before begining his next set.
Here are some other good things to know if you're gonna get maximum effect of your training:
Always eat within one hour after you've trained since you need to refill all the recourses you just used up from your body. And i don't mean something from mcdonalds or anything but a homemade meal that includes meat, bread/pasta or something and don't forget your veggies
Oh and drink milk, lotsa milk. Oh and salt is also good, not too much but put a little extra on your meat or something
Oh and if you're gonna do the explosive workouts then don't start with too heavy weights. Only newbs do that and end up hurting themselves in one way or the other without knowing it. Start out with weights which you think is kinda heavy and work your way up, increase the ammount of weight gradually each 2-3 weeks till you come to the heavy weights. Oh and the heavier the weights the more you gotta stick with'em before you can use even heavier ones =P
Always let your body rest. The minimum required time is 48 hours. So that'll be about 3 times of workout in a week. And try to do variations in your workout or else your body will get used to the training and you won't get the full effect. Like try training your legs or whatever in a different way after a week. I ain't saying you shouldn't ever train your legs the same way ever again, all i'm saying is that variation is good
Oh and one other thing that's really important but never gets mentioned is that you gotta remember to breath when doing your excersizes. I always see peeps in the gym becoming all red and blue cuz they always forget to breath
Oh and now to the hardest yet the best advice, stop eating candy and snacks, that includes chips, sweets, cakes, cookies, icecream etc. If you do you'll get your results a lot faster.
Damn this became a real big post, anyways one last thing i wanna say is that you won't see any real big changes in your body untill you've really gotten a lot more muscles, that's how it happened to me atleast. So just stick with it and after a year has past you can look back, i'll garuantee you'll see changes
Good Luck!
Edit: Damn foxtar beat me to it
And seems to know stuff a little more precisesly than me
Aw well