Hereby the betting blogs and websites that I visit regularly and wholeheartedly recommend:

Sports Arbitrage Services:
RebelBetting
BetBurger

Value Betting Services:
Trademate Sports
BetOnValue
WinnerOdds

Betting Brokers
Premium Tradings
AsianConnect88

P&L:
Daily25

Betting Strategies:
Green All Over
Betaminic
Punter2Pro

Tipsters:
pyckio
Secret Betting Club

Trading:
Betfair Pro Trader
Smart Sports Trader

Odds & Stats:
Football Data
BetGPS
WhoScored
BetBrain
SoccerVista 
Soccerway
Soccer Stats
OddsPortal

Bookmaker Reviews:
SBR
Top 100 Bookmakers
Arbusers

Gambling News:
CalvinAyre
Gambling Insider

Betting Blogs:
Cognitive Football
Betting is Cool
QuantumSports
Sam Priestley