Since you're a first-time owner, let me make sure you understand a few basics. When the outside temperature changes (or the sun shines on the tire for a while), the pressure in the tire will change. Also, when you drive on the tires, the pressure will go up. What the manufacturer wants is for your tires to be at 35 PSI during the coldest part of the day (usually first thing in the morning) when you haven't driven on the tires in at least a few hours.
Therefore, if your car sits outside at night, go out first thing in the morning, measure the pressure, and make a note of how many PSI you need to add to get to 35 PSI. When you get to the gas station, your pressure will probably be higher by then, but add the amount you calculated in the morning regardless. Double-check the pressure the next morning, but you should be pretty close.
If you park in a garage, it's a little more complicated because that's not the coldest temperature that the tires could be exposed to once you head outside. In that case, you can adjust for this by doing a little math. Take the temperature in the garage, subtract the outside temperature in the morning, divide by 10, and reduce your measurement by that amount. For instance, if your garage is at 75 degrees when the typical morning temperature is 55 degrees and you measure the tires at 30 PSI, then treat the tires as though they have 28 PSI, so that you'd add 7 PSI.
By the way, it isn't ideal that you let the tires get to 25 PSI (or maybe even less). You can wear out your tires more quickly when they're underinflated, costing you money unnecessarily. Check your pressures more often, especially in fall when temperatures are dropping. I probably check mine twice a month, but at a minimum you should do it monthly.
Don't worry about popping the tire. The pressure needed to do that is so far above 35 PSI that you'll never be anywhere near that.