Do yourself a favor and play at the MGM Grand. There Majestic Lions Dollar slots are as close to a "sure thing" I have EVER encountered as a slot player. Harrahs Blazing 7's are great as well. They are all located in the same area of the casino, so you cant miss them. I recently found that most of the casinos on the strip have their own "branded machines" such as Majestic Lions at the MGM (which play and payout EXACTLY like Blazing 7's just with different symbols. Ceasars has "Roman Riches", Aladdin has "Planet Hollywood" (only a few of them, though) Wynn has "Wynn 7's" and so on. I have done well on all of these with the exception of the Monte Carlos version, which I cant even remember the name of the machines because they were so horrible. I did see others playing them and winning , though. I had horrible luck at the Monte Carlo.
MGM and Harrahs are by far my favorite casinos on the strip. Good Luck.