Strategies To Lose Weight Fast

I started dieting in June. Thus far I have lost 25 pounds. I started losing weight because I’m going to Europe and well I want to look good! It’s been a few weeks and I haven’t shed a pound! I am 5’5 and currently weigh 160. I’d like to lose another 30 pounds. I got another 2 weeks left before my trip, hopefully I can lose a bit more before then. I have been traveling a bit, but have maintained my diet; however, I could work out a bit more. Any suggestions on how I can get out of this slump?