Well, what are you prescribed? Are you prescribed it specifically for insomnia or is it for anxiety?
Having an unlimited supply to xanax is a DANGEROUS thing. I am in the same boat and I just got off almost a decade of benzodiazepine addiction due to having unlimited access. The first thought that comes to mind is "Benzodiazepines destroyed my life". But the honest truth is, I did. No one forced them down my throat. I don't want you to end up like me, been off daily dosing for almost a year now and I'm still dealing with post acute withdrawal symptoms.
Do not get in the habit of taking benzodiazepines for sleep, or anxiety unless you absolutely cannot function/live without them. Benzodiazepines are handed out like candy, and I have never had a doctor tell me "Be careful with these, you'll end up taking them for ten years". I'd go in there and complain it's not helping me with my anxiety, and ask for help, and their answer: add another 2mg, I'm prescribed 12mg xanax a day, and PRN which means pro re nata, aka, as needed, so if I wanted to I could take 20mg/day. INSANE that a doctor would prescribe me this.
If you cannot be swayed from abusing benzodiazepines (I consider any non-debilitating anxiety/insomnia to be consider abuse/self medication) start with 125 micrograms. Yes, I said micrograms, not milligrams. Half of 0.25mg = 0.125mg, a dose at which alprazolam is active in non-tolerant users.
My opinion regarding regular use of benzodiazepines: Unless you cannot function without them, like I'm talking you're locked up in the psych ward due to DEBILITATING anxiety, you should NOT be on a benzo. Obviously many people do not think this way, but I fucked up big time with benzodiazepines, ruining my tolerance permanently.
IMO it's fine to take benzos occasionally if you do not have a debilitating psychiatric condition, like if you're super nervous for a presentation at university, or have to fly on an airplane for work, etc. But it is so sad to see people dependent on benzos that could have benefited so much more from learning to COPE with their problems instead of masking them and numbing them out. That's what benzodiazepines do, they make you not care, they make you numb. They should NOT be used recreationally.
They are a tool, not a toy.