One of the most difficult things to do is continuing a constant, committed daily practice. Keeping the right motivation and inspiration can be difficult, and sometimes can lead to people losing their practice after a while. For those that have been practicing for a while and have paused, maybe these instructions by Lama Zopa Rinpoche could prove helpful in restarting practice.
These series of advice were given to former monks and nuns that returned their vows, dropped their practices, and were looking to restart again. I think this advice could be helpful for anyone. One part that could be of interest was advice on how to sustain practice in the long term:
It is very important to meditate every day, continuously. You need to plan to do this for eons, not just for this lifetime, not just for 100,000 lifetimes, but for eons. Make the determination and plan to do lam-rim meditation. This is the antidote. This is the medicine. This is the safest way to protect your mind from negative karma, from the lower realms, from suffering in the hell realms; this is the most important thing to do for liberation from samsara and to achieve enlightenment. If you think that you only have to do it for a few years or months, then you will collapse, get discouraged, etc. As it is mentioned in the teachings, a chilli plant is hot, and by adding just a few drops of honey, just a few times, it doesn’t make it sweet.