deadlifting is great too, its the most calories you can burn in one movement, you dont have to be strong to do it however you can really increase the weight and you feel it very fast but even with beginner weight our body burns heaps.
i dont realise how much its working (due to low fatigue unlike high rep stuff) untill i get dissy then i realise how much im working.
also i got some advise the other day which hepled a supprising amount (for squats)
dont try to lift the bar try to push the ground away from you.
sounds dumb but it stops the back lifting and moves eveything down to your legs.
really try to push the ground away from you mentally.