One great thing you should look out for is the word hike boosters. To be sincere, these boosters are way better than in some games, and to add, they are very helpful. You are given a hint and a certain amount of coins every day. Word Hike Bee Booster reveals randomly the first letter of the row. You are usually asked before any puzzle to either select it or not to select it. This booster costs 50 coins.
You have more Boosters to choose from: