The most complicated problems are a snap for you on monday. Your friend or coworker hasn't even finished explaining the nuances of a situation before you have a solution, and a good solution, ready. You've hit some kind of stride. Your advice is stellar. You should be a consultant. Midweek, your energy comes from other people, which may lead you to want to be around as many people as possible. By thursday, the social quotient may get a bit out of hand. If you're feeling overwhelmed, retreat. On friday, flexibility is crucial, but saturday and sunday are going to go well no matter what you do.