I'm using weights.
Anyway there are a number of tips I can share, but I will run through only a few (note I'm no fitness guru OK) :
1. Exercise everyday and at the same time. Although the schedule calls for rest on Sundays try and do at least x stretch on Sundays. This is to ensure that your body get use to the routine of working out.
2. Try and find enjoyment in the workout, this should help to keep you motivated, I really like plyometrics and Kenpo X, especially the latter due to the karate moves.
3. Follow the diet guide if your can, although I didn't I try and increase the intake of protein, fruits and vegetable and cut carbohydrate intake such as rice, bread etc.. Portion size is extremely important! If you are like me and can't afford to follow the diet guide, control the amount of food you eat
I've reduced my carb intake to about 1/2.
4. Take longer breaks during the workout, for example after each block of exercise Tony gives 30 sec water breaks, if you're tired just pause the DVD and take the whole minute. This is not cheating, you are just giving yourself some more time for your tired muscles to recover.
5. Do the hardest workout first. I hate ab riper X so I do it first thing in the morning, just to get it out of the way.
6. Don't feel you have to keep up with Tony & his crew, I suspect they are on drugs anyway, just do your best everyday and you will be surprise how you will improve overtime.