Growing your hair from short to long can be a very long process. It can also be frustrating unless you set manageable goals and have realistic expectations.
If your hair is currently an ear-length bob, and you ultimately want tailbone length hair, it feels like forever until you get there. So set mini-goals. A great way to set mini-goals is by using body markers. In the case of the ear-length bob, your next goal may be to lip length, then chin length, then grazing-the-shoulders length. Keep those initial goals manageable and within reach of a few months to a year. This really helps keep you going. You don't need to lose sight of your ultimate goal, but keeping it on the back-burner saves a lot of frustration.
I've mentioned before the importance of taking monthly length photos. It's highly unlikely that you'll see much difference from one month to the next, but you definitely will see progress when comparing this month's photo to a photo from 3 or 4 months ago. Seeing definite progress will really help to keep you motivated, and when you start to think that your hair isn't growing (and it will happen), you have those old photos to look at and they will remind you that no matter how slowly, you are making progress.
Also, have realistic expectations about what your hair is going to look like when it's long. Don't compare yourself to someone who has a completely different hair type. If your long hair inspiration is someone with thick, wavy, coarse-textured hair, and you have straight fine hair, you have to know that your hair will never look like that wavy person's whose hair you so admire.
As your hair is growing out, learn to appreciate the unique beauty that is your own hair. Believe me, beautiful hair can be thick or thin, curly, straight or wavy. Now is the time to embrace your own individual hair type. Look for inspiration from people whose hair is similar to yours.
These tips will keep your long hair journey less frustrating, more fun, and you'll be less likely to want to give up.