I Found That I Keep Getting Hit HARD!!! By Terren And Protoss Forces So I Divised This Little Strateqy, You Want A Large Supply Of Minerals And A Good Sized Air-Force, And If Available Via Ally Or Mind Control, Sneak In A Few Guardians, If You Got A Mind Controled Scv, Get A Comsat Station Built, After A 4 To 5 Minutes After An Enemy Attack, Check A Trail Near The Enemy Base, If You Find An Enemy Strike Force Passing Through, Attack The Soon To Be Strikers And Take Full Control Of The Trail With Your Air Force Since There Tends To Be Anti Ground Only Units In The Group, Don't Worry About The Melee Attackers, They Will Be Dealt With By Your Base Defenses. Siege Tanks, Defilers And Reavers Are Not To Excape From The Group. Send A Probe To The Location. Have It Build A Pylon At The Trail And Completely Block The Trail Off With Photon Cannons. Now The Enemy Must Find Another Mean Of Travel, Nydus Canal May Be The Most Effective Unless You Find The Expansion Town Harboring The Nydus Canal. Zerg Aren't Effected Much Because The Overlords Don't Use up Preasious Control, But It Does Give You More Time Repair Defences After Being Attacked. It Will Affect Protoss The Most And The Least, Construction Of Other Means Of Transportaion Is Time Consuming And Uses Up Precious Psi. But They May Of Taken Over The Minds Of Zerg Or Terren Means Of Transportaton, Terrens Will Probably Try To Overrun The Blockade With Siege Tanks And BattleCruisers, So Keep Units The To Protect The Blockade From Such Dangers. The Photon Posts Can Also Serve As Observation Post To Observe The Enemy From. Proceed Against Such Strategy With Extreme Caution, Who Knows What The Team Who Owns The Photon Post Left Behind To Protect It And Repairs To The Damaged Photon Post Can Take Little Time.