Weight / Fat loss

So what is everyone's recommendation for the most effective way to spend 45 minutes to an hour a the gym?

Keeping up the discipline to do some cardio HIT when you feel lazy and would rather just lift some weights/do some resistance work would appear to be the answer that is staring me in the face, but feeling particularly lazy right now I wonder if anyone has any thoughts on the matter.

Mix it up.

I never do cardio at the gym as a rule. I loves the weights too much, and get bored on the machines. But I've had to recently, during the autumm storms. As I havent been up for training outdoors.

To kill boredom I make circuits of say 4 CV exercises.

500m row
3km cycle
1km nordic skiing machine
2km run

Then work my stability muscles, alternating between stomach and back.

15 sit-ups
15 back raises
15 knee-ups
30 supermen on a swissball

Then do the CV again.
Then the stability.
repeat untill fecked.

Blast everything, as they're only short sets. Easily fits into 45mins.