I don't know your budget or what you are looking for so here are a couple of things very popular that we've done.
10 and 11 bdays, Limo party with small group of girls. At 10, the limo picked each girl up personally at her home. When everyone was in the limo, they rode around town, back to our house, got pizza, made crafts, mani/pedi, movies, sleepover.
@11, same thing with limo, smaller group, we went to a nice hotel, they swam, etc, then all got dressed for a nice dinner out. This was in Plano at the Shops of Legacy. We went to dinner, ice cream, back to hotel (we were in a suite.....I was in the same area but not "in" watching every move they made, they had some freedom and of course, they did not leave the room), midnight room service snack, everyone left by 10am after breakfast.
@13, the big one. My daughter is quite social, cheerleader, orchestra, honors, etc....she deserved this party and helped with planning, etc. It was a (NO GIFTS PLEASE) as all of her parties are.
Held at our private country club, co-ed, great DJ, hot/cold appetizer finger foods, ice cream sundae bar, games with prizes (i-pod shuffle being the big one), others were $10-$15 I-tune cards. Our rule with big parties is same as the rule our club follows...teen parties = off duty police officer to be around. "IF YOU LEAVE THE PARTY FOR ANY REASON-YOU ARE NOT ALLOWED BACK IN" This was clearly stated on all invitations, and mentioned to parents. We had no issues, about 60 kids in all. It was by far the priciest one we had so far.
Since the 13th party, it was wildly popular, we did an end of the school year at the club and another birthday party at the club. Teens NEED a safe place to go, hang out with friends. I consider these parties to be just that...something for all the teens.
Last fall, we scaled down a bit (or so we thought), to have the party at our home. We have a huge back yard area, great for a party. We did the same thing except scaled back on food. We had a great DJ, 2 police officers because it was at our home. It was very successful. I believe we had about 120 teens here. My costs were drastically cut by having it at my home.
The police officers are not that costly (we paid $100 each including tip) and they help so much we being around in uniform and it just keeps the honest kids honest. We noticed some older boys coming down the street and we said nothing. They started to walk down our driveway, saw the police, turned and left...all knowing, the party would not be crashed with drugs, alcohol or out of bounds activity.
This year, we are already planning the Sweet 16 for early January.
Have fun! We are enjoying our planning already!!