Begging - try to keep defensive while gathering experience . After level 3 try to gank the other lanes to get some gold . A blue buff will be always good , because you can use "Two-Shiv Poison" to kill minions.
Middle of the Game - Keep pushing the lanes and try some hit and run using "Deceive". If you have problems use "Hallucinate" and then "Deceive" to have a succesful exape :)
Late Game - Shaco is one of my favorite late game champions . It's a really good DPS , you can easily escape with him , and you can trick your opponents with "Hallucinate" .
Have fun :)