Tip 1: Don't craft - crafting is time consuming, provides mediocre equimpemnt, wastes your skillpoints, and your guildies could craft for you. Start crafting later on max level.
Tip 2: Do not open crates, bags or tables while leveling - You only gonna find food and It's too much inventory management and if you really need food you can find a food storage and just loot, relog, repeat.
Tip 3: All loot in the world is personal - What you see on weapon racks and inside crates is only visible to you (except for special chests and crafting nodes) Relogging resets all loot.
Tip 4: You can deconstruct stolen items - Eventhough you can fence 50 items per day, deconstructing and selling mats is unlimited and you get crafting xp faster than crafting. Remember relogging resets all racks.
Tip 5: Damage scales with maximum Magicka/Stamina - Because of that you must specialize early and ONLY invest points in that resource, only use class abilities and weapon skills that share same resource. Hybrids sadly don't work in this game.
Tip 6: Start researching early - Keep buying infused and divine armor pieces, and sharpened and precise weapons from guild traders and keep researching them first, DO NOT research random useless traits. More traits you have, more SETS you can craft later in the game when you do start crafting. You don't need any crafting skills to research.
Tip 7: Do not refine ores, plants, wood and scraps - if you do collect those materials, sell them at guild trader as non-refined versions, they will sell for more than refined versions.
Tip 8: Download Guild Store pricing addon - And list all items you have in guild stores, it's almost free storage (1% fee) and if you need that item you can easily buy it back. This habit will eliminate your money problems in the end-game.
Tip 9: Gradually level many different skills - Do not run around with 5 Two handed abilities on your skill bar from start to finish, always have at least 2 abilities from class and weapon skill trees to gradually level them also. If your Two handed skill is 50 and you are not max level running around with a greatsword, you are wasting skill xp.
Tip 10: Learn Weaving early - Try to get into a habit of doing 1 light attack in between abilities, you will soon see that it takes 0 seconds and it's free damage, also you can start casting a spell before finishing heavy attacks and still get resource regen, so start practicing.
Please feel free to expand on this list, comment or mention if it was helpful at all.