A very simple nugget i got today while working with my complex code.
This might be very familiar to somebody but may help for those who doesn't know
while aligning the items in the block diagram press Shift+left click and drag the item you want..This will drag the item only through the Horizontal/Vertical direction. The direction depends on the first direction you try to move..
Try it...

-----
The best solution is the one you find it by yourself