Happy birthday! You have a great batch of years ahead of you, the best yet. I'm biased, but it's been my favorite decade so far (every year is better than the last, the idea of "peaking" is for chumps). Some thoughts!
Group trips - when you say "we should go to X someday," or "we should rent a house" "we should do a day trip to this cool thing or this sculpture garden" actually do it. Blow up the group text, have everyone agree on a day or week or a weekend and make it happen. People will start thinking about "settling down" and "having families" which makes everything that much harder to plan (depending on who your friends are -- I have friends with kids who still do it all). But do those trips, because they're really fun.
Cooking - get some nice staple kitchen stuff and start cooking. Cook for yourself, for dates, for friends, cook together.
It's ok to let go - Don't burn bridges if it's not toxic, but it's ok to let friendships fade if you've outgrown them and it's ok to recognize them for what they are. Sometimes you will grow together and sometimes you will grow apart. It's alright to let someone become an acquaintance. It can also be very hard to accept, but know that whatever you feel, it's ok.
Old friends - some people have known me through so many different phases of my life. Cherish those old friendships, and make the effort to deepen them. Keep doing those long phone calls, take a weekend to spend together, travel to see a concert together, be there for birthdays and other life events. Those relationships are really special. Same goes for family if that's possible.
Stay curious - you're on this app, so you're already curious. Keep reading, watching, hobbymaxxing. Keep trying things on and checking things out to see if you like them. Learn new stuff. That's not just for your thirties, that's for life.
Stretch and take care of your body - it’s your precious vessel. That's also for life.
