jackpot_jxmnLong time lurker here, so here is what I look at before signing up anywhere. After getting burned once or twice I learned to read the small print first.
First thing is the licence: find the licence number and look it up, and if your country is on the allowed list. Next come deposits and withdrawals: card, e-wallets and bank transfer should all be there, and cashout times should be listed up front.
Bonuses are the tricky part. Wagering of 35x or 40x is normal, and the bonus usually expires in a week or two. A good recent review that covers all of this is here [url=http://jobboard.piasd.org/author/nathan46f03a/]Superbet[/url] so you know what you are signing up for.
Most of my sessions are on mobile, so I check how the lobby works on a small screen. Test the live chat before depositing: slow or scripted answers usually mean trouble later.
Anyway, that is my routine. Set a budget and stick to it.