As Armed Assault and OFP have a lot in common, editing-wise you will most likely find answers on basic questions (waypoints, vehicles, triggers, game-logics, unit-setup, grouping, etc) in the Operation Flashpoint Mission editing section of this forum.
To browse the thread click here.
To search for a solution for your problem use the Forum search and make sure you choose the Operation Flashpoint Mission Editing & Scripting section and at the bottom of the search page enable "and older" to get accurate results.
You can also check the old OFP mission editing FAQ that provides solutions for common things like working with markers, mission objectives, parachuting, rearming, etc, etc.
Some of the solutions will not work anymore because of the changes with Arma like different weaponnames, unitnames, different syntax in scripting, etc, but generally this should be one of the first places to visit if you are running into a basic problem.
Link: Old OFP Mission editing FAQ
Have fun !
This thread is not meant for asking editing questions. It´s meant for posting references and tutorials or usefull links for editing newbies.
If you run into a specific problem while editing and can´t answer your question by using the search option of the forum, open up a new thread in the Mission Editing section and you will be helped.