Stay focused on finding good footholds when scrambling, and climbing down.
Scramble where it is safe to do so. It is faster and easier to scramble facing out.
Be very careful when abseiling; end-of-the-day abseiling tends to have high accident rates because people get tired, misplace anchors, have slings break, and generally don't stay as alert as is needed.
Keep falling rocks, avalanches, and weakened snow and snow bridges in mind as you descend.
Keep roped. It might feel like you're almost at the base when crossing that last glacier but if you're un-roped and fall down a crevasse, that's it.