Back when I practiced jujutsu, for a while we were concentrating on fighting in tight quarters. One of the best things for footwork I picked up from that is shifting. If you're in a left lead stance, rather than taking that right step forward with your right oitsuki, you'd instead shift to a right lead stance in place while executing the technique. The other part was to always stay on your opponent in close range, never letting them get too far away from you. Shita tsukis, elbows, and knees would be key at that range.
(My other favorite part was using your environment to take out your opponent, such as bashing him into a wall or other not so soft objects but that's another thread
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