I have lost and put on weight more times that I can remember, the thing that motivates me is the fact that I know how good i can look when i get my act together.
My tips are as follows.
I used to take a strong ECA that had all kinds of bad stuff in it, I currently take this http://www.myprotein.com/uk/products/thermopure
Its not as "mad" as some I have taken in the past but its kind on mass.
Here is my main tips for weight loss.
Workout in the morning (cardio) , takes a total mental change but it works, I find running helps and also swimming (although i dont swim in the morning, my local pool is freezing)
Stretch, alot of people swear by yoga so do your own type of yoga, just stretch and hold it, does not need to be (yoga - like) just any old crap.
Get a chin-up bar..... I find this works for a few reasons, it stimulates you and reminds you everytime you look at it that you have a job to do. Couple up/down everytime you pass it (bedroom door so you cant avoid it)
Plank before bed, 2 x 1 min is not gonna kill you but i find this works also.
Everyone as their own little ways, I also find (and this is a weird one) stand infront of a mirror and put you hands on your buttocks. Press in and tense up, this will give you a little indication how your doing.
This method can also be usefull for giving yourself a "pump up"
anyway just re-registered (my old username was back in 2008)
hope that is of some help