Training with a lower back injury

Can anyone recommend how I can train around a back strain? I started taking some anti inflammatory medication today and I feel a lot better than I did on friday night and saturday morning, but still a bit stiff.

I'm assuming the best thing I could do is concentrate on machine weights and just get through my sets rather than doing any free weights, especially with dumbells. I'm not sure how I will manage on back day which i tomorrow.
I've had back strains before and this one has resulted from poor deadlifting form, I haven't performed them in 2 weeks now, but I'm sure they contributed. I strained it while racking a 130kg bar after my squats on friday, I had my belt on too loose and my abs were relaxed and I twisted my hip as I racked it, that's how the injury occurred.

I would recommend investing in a foam roller as well as some racquet balls or tennis balls. https://www.youtube.com/watch?v=WVoKXGyG0qU&feature=g-user-u

I would also recommend doing what is in the video above. I tried it yesterday and I felt really good afterwards.