If you are worried about getting blisters, take some Micropore or similar tape, and tape your toes and other areas of concern as a preventative. If a blister starts to form, stop early and tape the area, or if it is more developed, use compeed. I also carry Fixomul or moleskin, and some iodine cream. I haven't drained blisters for many years - I find it preferable to leave the blister intact for as long as possible. If it eventually bursts, it can be treated like any other wound with the iodine cream, and covered with the Fixomul or moleskin.
I have also used Fixomul as a preventative measure under the sole of the forefoot, where it can be left in place for several days. I prefer strapping tape for the heel, but that should be applied in the morning and removed in the evening to allow the skin to breathe. If strapping tape is left on too long, it can lift the skin when it is removed - clearly not a desirable outcome.
The other element of any blister prevention regime are your socks and any lubricant you apply to your feet. Opinions vary, and there are many approaches that seem to work. My own approach is to wear a liner and outer sock, and treat the liner socks with an anti-fungal foot powder before putting them on.