Simple define tasks for yourself and let Mylyn focus on it.
I'm not able to use the bugtracking connections of Mylyn because we use a non-standard tracking solution at work (home grown and awfull), but the fast task-context switching with Mylyn is very usefull in daily work.
I work as senior developer so many times come orthers to ask something about their part of the code. I have a task for this interrupts, activate it and after they've gone i could simple swith back to my work.
