Out* 
Like all ego gratification. 
Yes. Just use them or don’t use them but don’t go overthinking things - which is probably the very worst thing you can do with pheros.
Perhaps there are some emotional signs to specifically watch out for?
If you start to think that mones make you invincible, or you begin to believe you can’t connect with people without them, then you seriously need to stop using them and just eat lots of celery instead. 
Deal with them as a crutch for a year or so, regularly use behaviour-reinforcing mixes/molecules such as A314 and P75. Over time, the need to continue using mones will diminish and eventually disappear completely.
Your second option is in making permanent the effects on others: the imprinting effect. Aqua Vitae and Nude Alpha from LAL are known to have this effect, as is A314. A1 and Beta -nol, as well as nearly all products based on these two molecules have strong imprinting effects as well. For long-term relationships, imprinting mones are ideal.
That’s about all I can add, aside from the advice already given above. Just keep a relaxed, focused state of mind and let the pheromones take effect without worrying too much and turning this hobby into a crutch shouldn’t become an issue. Remember, in the end, it’s about you, not whatever molecule happen to be attached to you at any given moment. Pheromones only do so much, perhaps no greater than 10% of the interaction. Pheromones do NOT fundamentally alter the way you are perceived, they only tweak it. Focusing on you and improving yourself as a person along the way is far more important than the pheromone mix you’re wearing, bar none. Don’t put too much weight into the power of pheromones - they can only do so much, just as any tool is only limited by the ability of its master to put it to use. The more you raise your game and social awareness, the more depth you add to your personality, all of this will allow the pheromones to take greater effect and for you to take advantage of that effect in whichever way and to whichever extent you like. The sky is not the limit, but the beginning of what’s possible when self-improvement and experience meet the right mix for your intentions - figuring out just what constitutes each of these factours, that’s the whole goal here, and that’s what’s going to get you results.
But most importantly, as mobo said, don’t go overthinking things! That can kill anyone. Just let everything flow, take the initiative to get done what needs to be done, and everything will come naturally with time and effort. It’s not about what could be, it’s about what is and what will be in the future. Doing always worked out better than hoping, so get out there and do and in a matter of months, pheromones will no longer be necessary, but they always remain a helpful tool in getting what you want - no guarantees, however. Even the best of us slip up on occasion. The trick is in figuring out how to quickly let go of that needless self-doubt and move on to another potential success, never letting small failures get to you in the path to ultimate success. Everything else is just figuring out the learning curve.
Also, fixed.
Also, fixed.