Depends a bit what stage of life you’re in and what’s the underlying cause.
Are you a student, parent, retired?
Is it possibly depression, a lack of long term goals, or feeling that what you want is out of reach?
If it’s depression, try volunteering to get purpose from helping others.
Need long term life goals to work towards, perhaps consult a rabbi.
Feeling that you can’t get where you want, try recalibrating. Sometimes we need to accept something wasn’t hashems plan for us even if it’s hard to let go and instead look at what our realistic options are now. Othertimes we can focus on what we can control when the big picture and outcome are not in our control. For example instead of saying my goal is to lose 10lbs (an outcome one can’t control), you say my goal is to exercise five days a week (a concrete step towards a goal you can control). Perhaps set a goal of one daily task that’s personally meaningful and motivating to you but something small and easily achievable for example study Torah 15 minutes, talk to a friend on the phone, or make a donation to tzedakah.
I hope things get better for you soon!