Painting should be started with ceilings, from a window to the room interior. Freshly-painted walls may look different than expected. The final effect is visible when the paint dries and oxidizes.
Start painting from contact surfaces (corners, a ceiling, walls, baseboards, sockets, etc.) Use good brushes and give the texture with a small roller. In order to avoid unsightly streaks, do not paint using long strokes on the whole wall, but apply the paint evenly by painting with short strokes and spread the paint aside - from the top to the bottom. Always start painting from the top and never from the bottom. The next sections should be overlapping, so you will have all places painted. This method will enable you to apply the paint evenly to the whole surface. It is worth remembering that when you start painting one wall, you should not stop working for the time being as it may result in a visible streak due to the painting stages.
For many indoor as well as outdoor works you will need a ladder. Depending on the purpose, you should choose a ladder of an adequate length and type. Remember to open it to the maximum as this can prevent it from sliding unexpectedly and ensuring that you will not fall down. Never stand on the top - it is assumed that an optimal position for a painter is on the second rung from the top. On the one hand, a painter can reach higher and on the other hand it ensures proper stability. Most ladders have paint can holders.