First of all, for me, when I tried clen the first time I did not lose one pound; but it gave me headaches and jittery hands only. The next time I tried it I was on an intense diet and lost a little weight, but cannot say that I would not have lost nearly as much if I had not even added the clen. I know a lot of people talk about it, but to be honest, I think it is for people really in tune with their bodies and who can see the mild difference clen can provide.
I am only saying this because I believe that if you think clen will make you thin, you will probably be very disappointed. But, if you are going to do the work to lose weight on your own, clen might help a little bit.

Because the sides also affect everyone differently at different amounts, it is good to have a plan; but be willing to change it based on how your body reacts. If you start out with one amount and do not see any jitters in the hands, you can probably bump it up a bit. But, when you are at 60mcg's for example and still get the jittery hands from that amount, there is no need to bump up the dose until your body lets you know it is no longer responding to that amount.