Formation flying:
Something that doesn't happen all that often, but when it does it looks kewl, keeps the flight in one piece meaning you've got more chance of working as a team and taking your mission objective out.
Get it right and it looks like this:
So, here's a few things to think about.
Biggest problem with getting in to formation is on take off - people tend to split up near straight away with some guys pulling near vertical climbs, others taking a more gentle approach. So, to help with this I tend to do the following - get everyone on the runway, staggered. Launch at the same time. Once you see the lead aircraft lift off, everyone else should do the same. Lead aircraft should inform the flight of their angle of attack, throttle position and target altitude/speed. Typically I'll go 10 degrees nose up, full throttle until I hit 2,000 ft / 300knts in the A10. If you all do this properly, the flight won't break up.
Next thing to remember is the "H" key. This key is the God send for formation flying. Due to the need to trim nearly all the aircraft constantly you find your formation tends to break up. Pressing H means your aircraft will automatically hold the altitude you are at when you hit the key. So, line yourself up with your buddy, hit the key and then all you have to do is decide on an airspeed and stick to it. Don't forget to take it off though when you get into combat else you'll be stuck unless you really heave on the stick.
Biggest help for everyone trying to stay together is the voice comms from the lead aircraft. If you're the lead, let everyone know your airspeed, altitude and heading. If you change any of the above, let the flight know it helps them avoid any unwelcome suprises.