on champions that have trouble with mana early game such as 
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAH
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAH
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAH
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAH
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAH
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAH
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAH
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAH
/panic
-Start flask
-Oneshot the wave with the stars
-Poke with the stars as well using the flask
-Rinse and repeat until lv3
-Push all the way under turret
-Recall
CONGRATULATIONS, AOL LANING PHASE IS OVER
-Return to lane after you filled back your hp/mana (it immediately came to mind to use the star voyage thingie, right?)
-Build a dark seal and a dorans ring
CONGRATULATIONS, YOU STOPPED LOSING MANA
-Rinse and repeat
Wanna be actually useful besides being a human zzrot like every champion should be after lv7?
Instead of watching how shiny the glittering effects of aol are maybe gank top, bot, invade enemy jungle with someone, go take a dragon with someone.
Sincerely,
-Someone that gave blue buff to an idiot aol and saw him last hit under turret with autos (missing all the creeps) full mana after lv7 with blue buff on and spamming help pings begging for a gank in a feeding and ungankable lane.
-edit-
oh also, picking smite on anything that isn't jungle is an idiot idea, don't do that, just don't.