Regain one's courage, 5 letters
Move heaven and earth, 9 letters
Be involved, 8 letters
Get in on the action, 8 letters
Join, 8 letters
Join (in), 8 letters
Join in on the festivities, 8 letters
Join in the fun, 8 letters
Participate, 8 letters
Share, 8 letters
Share (in), 8 letters
Play the shutterbug, 12 letters
Commiserate, 8 letters
Happen, 9 letters
Accept whatever is available, 11 letters
Be prudent, 15 letters
Be safety-minded, 15 letters