There are two things I struggle with when it comes to the pomodoro technique and maybe you struggle with them too. First thing is the length of the pomodoro: 25 minutes is a loooong stretch for me somedays. Sometimes I may not even be able to do 5 minutes at a time. Second thing is that the timer is a distraction: I keep checking the time versus focusing what I am supposed to be doing.
If you also struggle with that, then read this: I Created The Best-Ever Pomodoro Timer, Just For You by Clive Thompson. Clive has the same problems I have and he writes about them there. Better still, he made a better pomodoro timer. Go check it out.
Your week will be more focused and productive because of it.