[header] How to water indoor plants [title] Research your specific plants' needs. [step] Not every type of houseplant has the same watering needs, so educate yourself on the plants you have or are thinking of buying. Don't assume that every plant wants 1 quart of water every two days because all of your plants won't thrive like that. 
[substeps] Some may prefer to have their soil fairly dry most of the time, while others need it moist. Some may need the soil to dry out in between waterings.