Call for help every 24 hours(3NY,2MOSCOW,2CUBA)

Every 24 hours, you can:

Do ONE normal NY call for help job (Shake Down a City Council Member gives the best XP)
Do TWO bonus NY calls for help - usually Travel to the Old Country job
Do ONE normal Cuba call for help job (Havana Reconstruction in El Cacique gives the best xp)
Do ONE bonus Cuba call for help job
Do a normal Moscow job TWICE (Gun Down Some Russian Muscle gives the best XP).

Here is how you can call for help in New York twice in 24 hours instead of the normal once in 24 hours and call for help in Moscow at the same time. For this to work, you must have all of the New York Boss level open and any Moscow Episode started. Of course having episode 6 open will give you the best experience points. Also, your previous requests for help for NY and Moscow must of been done 24 hours or longer before starting this.

1 - open up Mafia Wars in 2 tabs (or 2 windows)
2 - in 2nd tab, travel to moscow then click on jobs, then episode 6
3 - go to first tab and travel to New York then click on jobs
4 - do the Shake Down a City Council Member job (or the Settle a Beef... job works too) and post the call for help
5 - after you post the job, go to the second tab, scroll down to Gun Down Some Russian Muscle job and click on the get help button. A window will pop up asking you to post for help on the New York job - Travel to the Old Country. Go ahead and post it.
6 - the screen will switch to New York since that's where you were last (on the first tab) - this is OK.
7 - in the same tab (2nd tab), select travel to Moscow again, go to jobs, episode 6
8 - scroll down and the Gun Down Some Russian Muscle job will still have the get help button. Click on get help and this time it will post a message to get help with Gun Down Some Russian Muscle job. Go ahead and post it.
9 - DO NOT hit home until 10 people have responded. To see how many people have hit the job, click on profile to see the notifications or click on episode 6 and scroll down to see how many have responded.
10 - once 10 people have hit the moscow job, click on home and you should see: (if you did the settle a beef job)

Your Mafia was eager to help on Settle a Beef... Permanently job. You earned $1,650,000 and 86 experience points.
Your Mafia was eager to help on Travel to the Old Country job. You earned $6,666,000 and 110 experience points.
Your Mafia was eager to help on Gun Down Some Russian Muscle job. You earned R$5,183,640 and 137 experience points.
(see screen shot below)

You just got an extra 110 experience points for posting an extra NY call for help.