Calories-wise, alcohol has about 7kcal/gram, whereas fat has 9, and carbs and protein each have about 4. So, (35 + 20)*7 = 385 calories from alcohol. If you're having about 1500 calories a day that translates to about 25% of total calories from alcohol. So yes! Those drinks can sneak up fast! Plus, beer contains a lot of starch and cocktails plenty of sugar, so they'll add carbs in addition to the alcohol!
1) eat real food - more vegetables, moderate meat, moderate fruits, less grains, less sugar, less vegetable oils.
2) exercise - moderate intensity cardio, sprinting, heavy lifting, dedicated stretching and mobility.
3) live - relax, de-stress, meditate.
Disclaimer: I'm not professionally qualified to make any formal recommendations. I've just done my homework and I'm my own guinea pig. All of my data, unless otherwise cited, comes from a sample size of n=1 (me).