One of the biggest things I do is "time chunk". Time chunking – and fine tuning the practice – allows me to work with optimum productivity. It’s worth trying in some form or another because it removes a decision from the process of doing: what to do and when to do it.
Another set of practices I put into play are outlined in my manifesto: http://productivityist.com/blog/the-way-of-the-productivityist-a-manifesto
I talk about a lot of other strategies over at my website, and in my e-book "The Productivityist Workbook".