Back-to-Back-to-Back

One of my short term goals was to experiment with a fourth run and try to exhaust myself a little before my 'long' runs.  I kinda did that this week: 5 mile tempo (wend), 4.6 easy (thurs) and 6.5 today (not exactly long - but i'm working up to this).  It did make today's run feel harder - so that may work out well.  I'll try again next week (5-8-8 if i'm up to it), and throw on a monday session (either intervals or hills).