Nerd warning! I have too much time on my hands now that the season is over...
Here's the obsessive schedule on waxing (provided that your skis have sintered base; see below):
1) Hot wax a few times with "soft" wax when brand new (or after "stone grinding" of base). This is called "Base Prep," and makes sure the base is saturated with wax, which helps more wax stick on, and serves as a reserve of wax. New skis come with some wax, but are not usually thoroughly base-prepped. The shop may include this for free, if you ask for it.
2) Very optionally, hot wax a layer of "very hard" wax every season. This increases the longevity of the base wax. This can be done at the end of the season as a "storage wax", and some ski shops will do this for free; remind the shop to scrape this off at the beginning of the season, before adding more wax. "Hot scraping" of the storage wax also helps clean the base.
3) Hot wax a layer of "universal" or "temperature specific" wax every 4-7 days of skiing. Temperature-specific wax may need to be redone if the temperature changes dramatically. For recreational skiers, the difference may not be noticeable, and universal wax will be more than good enough except in super-cold conditions.
4) Rub on liquid "universal" or "temperature specific" partially-fluorinated ("fluoro") wax every day; I usually do this at the end of the day. This helps make the hot wax layers last longer, and it's a great way to adjust to changing conditions. You may need to add some at mid-day, as liquid wax wears off quicker. Rubbing it in with a cork block helps it last longer; most resorts have a belt waxer that does essentially the same thing. Some people prefer to use Zardoz NOTwax, which is basically Teflon; does not last long, but easy to apply, and are fantastic on warm snow.
However, you don't have to be obsessive. I've found that 4) alone goes a long way. I would do at least 3) or 4) with universal wax, preferably 3), if you want to do the bare minimum. Most people skip steps 1) and 2) and don't notice any difference. If your bases look solid and glossy, with no white "dry spots", at the end of the day, you can probably keep the waxing schedule you are following. If they turn white and cloudy completely, you can have it stone-ground and start over.
Also, find out if your skis have a "sintered" or "extruded" base. Sintered bases need more wax to glide and also benefit from it. Extruded bases can manage with just a little waxing, but more waxing does not improve the glide much. Hot waxing on extruded bases is mostly wasted.
Just as a bit of extra information, wax dissolves into the plastic base, and then leaches out slowly. Much like how bleach or perfume blends into your skin, and then you can smell it forever, and you can't wash it off. Wax that is sitting on the surface of the skis will quickly wear off; so the wax needs to be fully or partly (in case of fluoro waxes) buried in the base, and there needs to be enough of this to keep leaching out the whole day. Hot waxing increases the capacity of the base to hold the wax, as does corking, which creates heat. Liquid wax mostly just sits on the surface, although some of it will dissolve in. Extruded bases have less of the "amorphous" area where the wax can seep in, which is why hot waxing won't help much. By contrast, sintered bases are full of amorphous areas, and are thirsty for wax.
Hope this helps, without being intimidating!