How long do I have after a bread meal to bensch (say grace)? Does it matter if I am distracted by other things? For example, I eat at 1 pm, then I work for 5 hours, go to the store for half an hour, ...
For what prayer responses (e.g. amen, baruch Hu uvaruch Sh'mo, y'he Sh'me...) may one interrupt his own recital of birkas hamazon?