Add paused sumo deadlifts as an accessory to your routine to build your posterior chain, increase strength and improve technique. It's a great exercise for glute and hamstring development.
Start off light until you're comfortable with the movement and pick a weight around 50-70% of your 1RM for working sets.
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Rope pulldowns are fine, but try this pushdown variation using two handles for a great pump and a new stimulus. Great for warm-ups.
This bodyweight exercise might be too advanced for you. Check it out.
Blow up your arms and boost your bench press with this highly effective (but excruciating) finisher.
You don't need a garage full of gear for this workout. In fact, all you need is one dumbbell.