How to trick yourself
Sometimes you get waylaid in your progress by: putting it off, panicing before beginning,... In these situations you have to lead yourself up the garden path. If you despair because of the big amount of work try to ignore your feelings and pretend your work consists of just sitting at the desk for 15 minutes. While you are sitting why don't you look in your book. And if you don't understand, just go on reading and pretend it doesn't matter. It is important that there are no insoluble problems which may raise your stresslevel.
