My thoughts?
1) you need to party up more.
2) concentrate on setting your own certain challenges
Ultimately, Destiny is a grinding game. There's many things to do but because you have choices (quests, adventures, events, trials, NF, etc) you have to decide what you fancy achieving. Then see if people can help or can they do together.
I focused solely on Power Level in the first 2 weeks, not completing everything I see.
Problem sometimes with Destiny is actually ourselves. I jumped in with Crispy and Tom the other day to help out some things. Before I even realised what happened because we were chatting about other stuff, Tom had activated an adventure and we completed it. But I had no idea what it was about because Adventures are to get rewards but more importantly people who want to learn more about the story, like side quests.
I'm not rushing those things. I look at what objective can I set myself that night to do. It might be just 'help some FGers' and I'm good then.