I think when children are younger, it's a good idea to cater to all three learning styles and you will start to notice their preferences as they get older.
When my children are preschool aged, I try to do something related to math, reading, fine motor and gross motor skills every day. Since preschoolers are so busy and active, this can be fairly easy.
For instance, right now, my children are playing with playdoh. I had my 4 year old roll the playdoh into snakes (fine motor) and then use the snakes to form the shapes of 5 letters (pre-reading). Once she'd finished, I asked her the names of the letters and their sounds, and then she crumpled them up and is doing her own thing making shapes with cookie cutters (math). Later, they'll go outside and play (fine motor).
We do something simple like this every day, be it a game of bingo or candy land, reading an alphabet book, counting as we set the table, etc.
We also use a math and phonics workbook that we use because she asked to "do school" like her big brother. We will do the workbook pages around 2 pages per week. They are really simple and colorful and on her level.
We use A Beka K workbooks. We used Rod and Staff A-B-C series last year and she really enjoyed them. Those also contain cutting and pasting activities that she enjoyed. Kumon is another good workbook series.
Here's some additional information about preschool guidelines
and preschool curriculum
In addition to what I described above, we also read, take trips to the library and go on fun outings as a family. I try not to get caught up in planning different units as that can get stressful and overwhelming for me.
Instead, we take the approach of reading about what we're interested in and doing things we enjoy. This approach keeps us relaxed and happy, and I've found that my children learn everything they need to know.