Do wait for your dog to give you his/her attention and reward that. Continue until your dog sits and only then repeat the command while rewarding. If this seems too difficult, it's likely due to the environment you're both in, which is too distracting.

Do practice walking your dog around the park, saying hi, and walking past dogs but focusing on your connection first, without going inside until later, little by little.

Do let your dog greet other dogs but keep the interactions short and sweet, paying attention to how both dogs are feeling before meeting again.

Do provide your dog with access to monitored play sessions, scavenging exercises, snuffling games, food puzzles, new training lessons, and experiencing new places.

Do your best to avoid the behaviour, say "Yes!" and reward when your dog isn't jumping or begging. To help, provide your puppy with something else to hump and/or remove them from the overstimulation from where they are, as well providing them something different like an interesting smell to help change their mindset.

Do provide them with something else to do instead, and if/when they make the choice to give you space, time and stop begging, go out your way to reward them with a tasty treat to let them know that that is the behaviour you are happy with, instead.

Do your research before getting a dog that you're hoping will be a good fit for this role. Contact recognized organizations and carefully consider the pup your choose, learn more about its parents, their overall demeanour and energy level.

Do play with your puppy first (do both physical and mental activities) so that he/she feels mellow, before taking both dogs for a little walk at a comfortable distance from each other, prior to letting them meet closer.

Do allow your dogs to see each other at a distance (on leash) and walk away from one another in a fun and inviting way before trying again for a little longer, and closer each time. Keep things short and sweet and leave your dog wanting more.

Do use a scent to redirect their focus/change their mindset a little, or even better wait for them to self-regulate their own emotions (quiet down, relax) before interacting and guiding them towards a better choice.

Do try out creative ways to provide your dog with food and water, other than training. Consider snuffle mats, food puzzles, scent detection games, agility training, impulse control and more.

Do bring out and swap out toys to keep your dog more engaged with them by creating a frequent sense of novelty when it's time for you to play together.

Do practice sharing and exchanging items that are of low value to them, before expecting them to do the same with something they may see as being high value.

Do register for private training so that your trainer can first assess your dog in scenarios where dogs aren't involved, to give you a proper understanding and tools about how to build up to the idea of other dogs being around, before jumping into a group setting.

Do lower your expectations, and work with your puppy in environments and around others that give you the room to make things easier for yourself as needed, before tackling scenarios your puppy is having difficulty with.

Do provide your dog with space so that they can on their own regulate their own emotions. If the environment does not allow it, consider that it is perhaps the cause of the behaviour and should be re-evaluated with a positive reinforcement trainer.

Do your best to not react too much, and wait for the nipping to cease before providing an alternative. If this is being done repeatedly, consider teething (for pups) or boredom be at the root of the issue and the unwanted behaviour is the symptom.

Do your best to avoid the behaviour, say "Yes!" and reward when your dog isn't jumping or begging.

Do attend doggy play sessions where you can reward your puppy for slowly taking space from you.

Do invite your dog to go into their crate when you know they're feeling tired, relaxed and like resting.