The only way to increase level in Garena is to keep on play day and night. This is what everyone think about at first sight. If you just back track, you can infer that, if you are playing through out , the game must be running through out. Now you got a clue. But wait, just opening the game through garena is not enough. You must be in a network of other players. You cannot join a game in garena and just sit back as other players will kick you from the server. Dont worry , here comes a handy way.
Lets take counter strike for example. Create a game server in it through HLDS. It wont eat too much memory. Now you are connected to garena's network. Dont least bother about players. Even if they join or your server is empty, your Garena level will increase. You can continue your other works.
Try it! It works.
Statutory Warning: Dont feel guilty . There is nothing illegal in this. You are just creating a server. Whether players join your server or not is not your mistake.
Infected with Harish Syndrome