Here are my personal tips of surviving these Tom Clancy's Ghost Recon games:

Tip #1- Don't rush the mission or you'll be in a chaotic situation which will led to disaster. Take your time and go through the mission slowly and carefully.

Tip #2- Always strategize your plans so you won't go into mission without knowing what you're doing.

Tip #3- Always check your map (unless you got the whole map memorized in your head). I personally check my map a lot so I know where to go, where to order my squad teams, and figure out the enemy's last location.

Tip #4- Never stand up or run the whole time. Always crouch or lay on the ground when an enemy spots you or starts shooting at you.

Tip #5- Don't fire your rocket launcher while hiding or leaning from a corner on a wall because you would most likely blow yourself and possibly your squad members if they're near you in the blast radius.

Tip #6- Never send a squad team who have grenades or grenade attachment weapons rescuring the hostages. From what I experienced they tend to use their grenades or grenade attachment weapons on enemies hiding in a corner where the hostages are being held. (I'm not saying it's always going to happen but just be aware of that).

Tip #7- Don't send your sniper in a firefight (No this is not Call of Duty: Black Ops where snipers can be offensive or 360 no scope enemies up close and personal. XD). But in all seriousness, don't make your snipers offensive. Use them as defensive, behind enemy lines and far away.

Tip #8- If you're stuck in a hairy situation where they're enemies hiding behind doors or in a small cramp rooms with a window, this is where a grenade launcher attachment weapon would really come in handy. Just blast the doors or the small cramp room's window and you'll make your life, time, and your squad's life a lot easier.

Tip #9- If you're playing the single player campaign (most likely since multiplayer is dead unless you're super lucky enough to find a server to play multiplayer with others which I doubt but hey, what do I know. I've only played the single player campaign) complete the bonus objectives which then at the end of the mission will award you specialists which are your awesome OP/MVP soldiers in the game.

Tip #10- Don't forget to upgrade your soldier's skills (rookie soldiers or specialists) either way. Once they're upgraded they'll get a little better, now for the specialists they'll be very reliable assets in the game especially for those hardcore missions. Just make sure they don't get GG killed in the game because once they're dead.......... they're dead (logic right xD).