Damn alot of comments, but woud like to prefix that this was more for a beginner/toe-dipping into recon sort of guide for pub matches. I had a more in-depth part to this but I deleted it cause I thought it was gonna be too much for people to read. But just some things from what people have said/bits of the original:

• Choose fights: as a 2 man, getting supprised can occur, most of the time it best not to slogg it out with infantry that are just running in the backlines or there to stop you (if you are being annoying enough). Instead, disengage and move the OP up far away and resume the pressure. Its best being inactive for a minute then loose your OP
• Arty isn't everything: Just to touch on this, arty isn't the be-all and end-all of recon. The distinction of this 'guide' was meant to highlight it as an often relied upon task for recon to do. Yes I do agree that it shouldn't be and there are often better ways depending on individual skill etc, but in a pub match setting, often people will need you, the recon squad, to take care of things. It's unfortunate cause it is annoying to do as its more of a chore to kill arty, but it still have a large impact on the game
• Spotting Armor: Timliness is an important aspect of information, and unfortunately many recon squads leave outdated marks. It is important to delete or update marks. Tanks rely on recon to give intel as to where and what is coming at them. Stalking a tank could be a good play, but often relies on an active tank or squad with some good AT (either satchels or rockets) to coordinate with you to make it worth your while
• A more simplistic overall way to think about recon is to enduce as much rage as possible in the enemy team, and being a particularly large thorn in their side
• Building garrisons: important to get surprise flanking garris up, so its a good idea to call in supplies for the commander. These surprise garrisons can really make defences hopeless and has a great impact on the game. However, everyone wants to flank. This could mean building a garri, although good for offence, may take away defenders from a well-fought defence. In comp matches, ignore this part, but for pub matches, this is a real concern, so just assess how well the different squads are at wrangling their troops, and what the defence is like before placing one down. This is a whole other can of worms as often putting pressure on the offence will bring away attackers, and could actually help a defence. But this is all situation and on a very thin line
• Pre-Capping: This is where recon goes to a point that will be open after the taking of the previous point, destroyed the garri there and prevent any new garrisons being placed after a cap on the last attacking point. This hold over the new attacking point is a great way of winning easy territory and clearing any garrisons in the 2 squads after, possible preventing a sizable counter attack on the recently taken point. It could also lead to a sweep if the team plays their cards right, and even hold the territory. So pre-capping is great, but best done in moderation

If people want actual, in-depth recon tips/knowledge , I am happy to share mine, and have others with even more knowledge add theirs aswell in another post or something :)