Same thing I do for most teams.
First work out the holes in your team, go over who you have how they play and how well they play.
Need to fill those holes ASAP, try and avoid signing any real big names they cost too much and will cripple you financially before you know it.
Just aim for decent proven players that you know will do the job, that wont try and destroy your teams wage limit.
I find it's easiest to pick your tactic and then work in players to fit it, then you don't get caught up trying to buy some wonderkid that just popped up on the market even though you already have 3 players in that position thus wasting money you need to keep youself up. You can get some pretty decent players for around 1-2mil so don't think spending low is bad.