New people to the fitness world and veterans alike are all going to experience some problems along their fitness journey. That's just how life is. It is up to the individual to decide how they are going to react to these issues. You can either try to ignore the problem, typically leading to an undesirable result, or you can decide to do something about it, make whatever changes you need to make, and probably grow from the experience. I'd like to take this time to outline some of the most common issues I see people have in regards to fitness, and offer some solutions help fix the problem.
The first, and probably the biggest problem I hear people have that that they think nothing they are doing is working. Whether they are trying to lose weight or put on some muscle, a lot of people will get discouraged after a short time period because they do not see the results they want. They're then go on to think that they are some special case where they just can not do whatever it is they are working for, and then extremely give up.
The first suggestion I have to solve this issue is to change that mindset dramatically. Everyone is capable of achieving their goals, you just have to know that. Know that seeing results takes a lot of time and that consistency is the name of the game. If you do your research, find a routine, and get your diet in check, the results will be inevitable, you just have to stick with it. The second suggestion I have would have to track and keep a record of everything you can to keep yourself moving forward. This may be how many miles you walked on the treadmill, how many reps you did on a certain exercise, how many calories you think you've burned in a given day, how many calories you've eaten, etc. Once you start doing this, you not only notice some changes you might need to make, but you'll be able to look back at the progress you've made. This has definitely helped keep me motivated toitting the gym.
Another obstacle that people will come across is this idea that they do not have time to work out. This is no more than excuse and a mental blockade to keep you from reaching your goals, and to justify not exercising. I'll fully admit, even though I'm not proud of it, that I myself have used this excuse a couple times over the years. The best way to keep yourself dedicated is to fully include exercising in your schedule. Do not make it something that you're trying to squeeze in, make it something you have to do, like going to your job or making an appointment at the dentist. You probably would not cancel on those things without a pretty darn good reason, right? Put fitness on the same level as those. If you can manage that, getting your daily fitness in will become second nature.