I can get so much more done in a day, and feel much more satisfied about the work I do. I can also sleep through the night - less stressed.
More appropriate handling of interruptions is having a positive effect in the team. Attention bookmarking is allowing me to pick back up tasks more quickly.
Batch processing has been very effective for me. It allows me to mix up my day better - having periods of intense concentration, but following these with a batch of what I call 'grunt work'. It's a lot more sustainable to work in this way.