Word of caution here. It is perfectly feasible to launch and recover from a beach, but please, get someone to show you or advise you for the first couple of times. It may look strait forward, but trust me its not.
More damage has been done whilst launching or recovering in unfavourable or moderate conditions. And there lies the problem, how do you describe an unfavourable wave? The advice of coming in hard on the back of a wave is sound advice, but remember your still gonna run aground!
If there is anything more than gentle waves that you wouldnt let toddlers into then, chances are you wont be able to hold your rib in it. For some sound advice learnt the hard way read bilge rats tale about how his rib flipped over on a beach launch (see thread What would take to flip a rib
) Ribs are great in rough waters but they need space.
If you can travel, then launch from a slipway, its a lot easier.
A well executed beach landing can look a most slick manouver, just remember to get the weight to the back of the boat. If necessary drop the crew off and wait until they are ready to receive you, or drop the anchor far enough out to hold the boat head to wind.
Have a plan of what ifs... and be aware this is sods back yard, he learnt most of his most cunning foul ups on a beach. Nearly everyone who has tried it will have a tale or two. Ask around.
More than anything its good entertainment!!!