Potted plants need to be fertilized, especially if in the same pot and soil for a long period of time. Many types of fertilizers are available and any may be used according to label directions. Select one which gives the best results for existing growing conditions. Do not fertilize dry plants as the roots may be burned. Water, then fertilize in a day or two. Resting house plants need no fertilizer.
When starring out, pre-dampen your brushes slightly before dipping into the paint. Slightly damp brushes apply paint more evenly. When working with latex paints, moisten with water: when applying oil-based paints, first dip them into paint thinner, then pat them with paper towels to remove excess thinner.