There are many ways you can give advice :

– You should … (eg. You should wear a hat).
– I recommend that you … (eg. I recommend that you stay away from wild animals).
– Look out for … (eg. Look out for dangerous animals —> Keep an eye on dangerous animals).
– Make sure … (eg. Make sure you don’t forget your first aid kit).
– I advise that you … (eg. I advise that you wear dark clothes).
– Here are some tips … (eg. Here are some travelling tips —> pieces of advice).